Does anyone make such an animal? It would be nice to keep solvent and such out of the action, and to keep the rod straight down the pipe.

Yep, give a call to Sinclair shooters supply and they can fix you up. While there, also get one of their stock protectors. They work great.

Russ Haydon lists delrin "O"ringed guides for the Ruger.

http://www.shooters-supply.com/cleaning_and_maintenance_equip.html

Thanks guys. I forgot to ask Russ first. He's located just across Puget Sound from me. A great source.