I got mine from Hi-Po Parts.
www.hipoparts.com At first, I got the "Extreme" set, but later changed them to the "Elite" as they are MUCH brighter and dimmable. No issues so far, very happy. I also used the blue domes as they were still good and I wanted the original look.
A word of caution. If you have idiot lights, do NOT put an LED in the ALTERNATOR socket. This MUST remain an incandescent bulb as it can and will damage that circuit. (Don't ask me why, I'm no electrician!!) Earlier instruction sheets showed an LED in the ALT socket as well as the socket in the wrong location. Hopefully this has been corrected by now. Check it anyway.
Geoff.