What you may not find, "off the shelf", at the big boxes, is a 10" WC, but you can "special order" them, just be aware of the price, because you may be able to beat that at a plumbing supplier, off the shelf.
And while you are at it, consider changing the angle stop to a 1/4 turn ball valve.
The 30" is today's standard, which can be addressed in the pullman/vanity.
If you are contemplating a built-up floor product there are flange extensions to address that as well.
Last edited by Snoonyb; 12-20-2016 at 08:01 AM.