I have the Moen Riser lavatory and prob the parts list. Was told it was discontinued years ago. I am trying to find the old clear acrylic "caps" . I bought it years ago and we installed it ourselves... thank you

Hi Lady and welcome to the Plumbing pageat at AskMeHelpDesk.com. You piggybacked on an a 3 year old dead thread so I gave you one of your own. In the future, before you post, look in the upper left hand corner for the date.
You're looking for the snap in cap that snaps into the top of the knob. Correct? If Moen can't help you I would try plumbing shops that do construction. Call around and see if they install Moen valves in their new jobs. My old shop installed Moen faucets and we always had a bunch of old faucets laying around. That's your best bet, Good luck, Tom