Great supplier:
I just replaced about 1/2 of the coaches interior halogen bulbs with dimmable LEDs with bayonet G4 pins. I bought them from a distributor who owns a lot here at Pelican Lake in Florida where we're camped. He has been in the lighting business for many years.
Terrific service and priced about 1/2 of others on dimmable bulbs that are very hard to find.
He sells various sizes of LED bulbs for RVs and boats.
No web site but here are his details:
Call
Bill Herring
914-474-7324.
I'll have more to report after I replace more and they burn out in 30 to 40 years.