We did a custom one from
shower. The one in the RV got a crack and the issue was they were too big or too small and they were cheaper made that we we took out.
It was made to fit the space and work out great. We ordered it and when we had all the stuff in including a new faucet, rip out the old and put in the new one with new pex pluming and everything. We like it so much order one for the home and did the same. Been 6 years and not one issue. It will be somewhat heaver than what you take out. The walls are 1/2 inch and the pan is heavy but made well. Don't think that you will see a Resale valve. Just out of pocket cost.