I don't have side splashes, have no problems

what jck said

vanity between two walls, no sidesplashes, never wanted them. don't want them now, everything's fine..

You'd have to look in a stone yard for remnant scraps that match, and have them cut and polished. You can't buy them ready made. Or........ have an entirely new top and matching splashes cut. Or don't have side splashes. Pick one : )

Contact the company, there's an 800 number or you can call the manufacturer. I have found most these counters sell a side splash.

You really don't need a side splash and would probably look better without them.

Thank you for all the feedback! :) I did contact the manufacturer and they don't sell side splashes for their vanities. I was concerned about water, moisture, etc. on the side walls without having the splashes but if it hasn't been a problem for others, this helps ease my concerns. :)

The chances of finding matching splashes are very low. Side splashes don't even match when they're supposed to:

We are installing the Ove Lourdes stand alone vanity from Costco which does not come with a side splash. We are tucking it in along the left hand wall so I was concerned about in not having a backsplash, mainly for visual purposes. Our professional designer said that we do not need a side splash visually or practically.

She is correct.

I was unlucky then the backsplash was delivered by a stupid shipper and it arrived in three pieces. They then shipped another super well packaged that arrived great. We used the broken one for the side splash. I only had one side.