Aqualine in my home

I have a 1972 Schult mobile home with Aqualine shower assembly. I've located the valves for the faucet handles through Danco but cannot find the 3/4" nut that holds them in place (I only need 1 but would prefer both). I was advised to go straight to Aqualine but I've googled till I can't google no more. I don't think the company exists anymore for the product I require. Any ideas without having to replace the entire handle system?
Thank you,
Ginger

I believe Aqualine was the Sears logo for Valley products. They are a gonner! Although some handle, cartridge, and seat parts are still available from aftermarket sources like Danco, Lordahl, and Kissler....the chances of finding the part you need are not good.