google "interior knob with large escutcheon plate" to see if anything the right size in a familiar brand (like Schlage) turns up. Measure your current escutcheon plates. You can also remove the escutcheon plates to see how fixable the wear and tear areas are currently. Maybe you won't need large escutcheon plates after all.

A good local locksmith may suggest options.

Were these doors prepped with this exact hardware in mind, or did the builder prep the doors on site for the door hardware?

I recently purchased new door sets made by Omnia, which are manufactured in Italy. For something like door sets, I would not purchase online. I want to go to a showroom where I can feel the weight of the materials, see what the mechanisms feel like when turning them, check out the finish, and talk to a good sales person who can explain the difference in quality between brands, and ask where they are made.

I have always had really solid door sets and never needed repairs. However, I'd ask a repair person what brands most often need repair - and stay away from that brand, and ask which brands have the easiest to obtain parts.

It is scary stuff when it comes to kids being locked in a room! My dog once locked himself in the room by pawing the latch on our 170 year old bedroom latch set. The locksmith got it open by jimmying a blood pressure cuff into the door frame and pumping a few times. It busted the thing open. Luckily E-Bay had replacement parts for my 170 year old door set!

Some things obtain a certain beauty as they show signs of wear over time as long as they remain functional. If you do not realize that now, you may several years from now. My wife realizes it.

Millworkman, the doors and the hardware were all new. I don't really know what goes into prepping a door... Assuming they're all done specifically for this hardware. (Oh - and my lovely contractor decided that the decorative nonfunctioning keyholes on the plates looked funny, so he literally colored on the doors with a sharpie to darken the spot under the hole. Thought himself pretty clever. I am STILL mad. It looks hilarious/terrible. And this is why the long plates would be ideal for replacing.)

Hallett&Co., a locksmith did replace one spindle (the first knob that broke). He had a difficult time finding something that would work, and it is not ideal. The knob is very tight and doesn't function all that great. I wouldn't want a house full of doorknobs like that one. But I'll look into it. Thanks.

Mark, I don't disagree. I would have saved all the old doors and knobs in this 19th century house if they'd been worth saving. Unfortunately, many of them were in quite bad shape, had been chewed by cats, had bad hardware, etc. The amount of work was prohibitive. These new door knobs are, unfortunately, very poor quality. I know there are better, more durable options out there that will stand up to time.

Spray paint can fix the knobs.

I agree that an in-person showroom would be the best option, if there is one in your area. It is situations like this where a store's great knowledge can be so helpful

https://www.rejuvenation.com/shop/new-and-featured/new-hardware/?Kenshoo=k_EAIaIQobChMIm-Oc6rKgggMVCURyCh1qRwVsEAAYASAAEgK4VfD_BwE_k&cm_ven=NonBrandSearch&cm_cat=Google&cm_pla=NonBrand_Search_Hardware_Google_Exact&cm_ite=renovation%20hardware_298497013_kwd-47300662&gad_source=1&gclid=EAIaIQobChMIm-Oc6rKgggMVCURyCh1qRwVsEAAYASAAEgK4VfD_BwE

FWIW, I’ve had Schlage (interior and exterior) for 10 years without a hitch or wear and tear, except for the entry which is exposed to harsh sun and even that’s minimal.