I have a Rohl
Appears you have a blockage in the hose itself.
Remove and use a piece of wire to clear the blockage.
My plumbing supply house was
Nice.
Paying that price for your shower faucet, I would think the supply house would work with you on that. eBay shows cross handles so they are available.
The plumbing supply store should be able to order what you want.
Not finding what you are looking for?