You have the same problem as me. I am looking for 2 mirrors 24x42. Looked everywhere, we are having to have them custom made. If you could use 24x36 that is a pretty standard size mirror. Not sure where you are located but HomeSense has quite a few oval mirrors right now in that size.

Hmmm, I found an oval bathroom mirror for the girls' bathroom at Home Depot. Can't remember the brand. It is frameless and it has clips on the side, to tilt (very handy for kids, as they are short - for now!)

Looks like Homesense is canada? uggg in New Jersey- lol

I was in Ross yesterday and they had some nice mirrors.

Saw one or two similar, oval and maybe an arch top, 24W as I recall, in Sears' Hardware store (not the main store).

I was also going to suggest Ross, TJ Maxx, Marshall's, JC Penny, Sears, Kirklands (Freehold Raceway Mall, 3710 Rt. 9
Freehold, New Jersey 07728), IKEA, Crate and Barrel home store (maybe online) Overstock, Pier One? Ebay? Ace hardware (searched oval mirror) Zenith brand, 32 x 23, a cool looking oval medicine cabinet come up for $99, free ship to store, oftentimes discounts on shipping)

I have been shopping around for an oval mirror that tilts. You might consider the Gatco Franciscan mirror. It is sold by several on-line retailers.

Here is a link that might be useful: Gatco Franciscan Oval Mirror

I found a few on Overstock.

Here is a link that might be useful: Oval tilt

Overstock - too smalle
Gatco- too small

Looking for 23 wide x approx 36 H

Is Kirklands worth driving too?? Might have to check that one out-- would they have simple mirrors- chrome??

Should i do the standard slab mirror that goes all the way across or am i just compromising?

Try Pottery Barn and/or Restoration Hardware. They might be a bit more expensive, but the quality is usually good and they are good with returns/exchanges.

I used Gatco Tiara large beveled mirrors in the bathroom in my previous house. They tilted and are close to the size you want.

I like the idea of arch-top mirrors for a kids bath, or one large framed mirror.

In my area local plumbing stores carry a good selection of mirrors.
Look at the tilt mirrors carefully before deciding on them. DIL had one in her previous home and I was never crazy about. Because of the way it extended off the wall one could see behind it easily and for some reason it bothered me! :(
Also, over time the swivel became loose and it would only stay in the one, downward position.