At the risk of telling you what you already know, the sites below have proved most useful for my ongoing commando restoration in the US.
Greg Marsh- Good selection of parts, quality and easy to order via email. Best prices in the US for Genuine Andover and most other brands. Great prices on Electronic Ignitions. I check here first for anything over $20.
Andover Norton- OEM, less than $800 comes in duty free, not sure about tariffs atm. Very fast shipping. Easy site to navigate.
RGM- UK based, but will ship to the US. By far the lowest prices on camshafts and some other pricy bits. Better selection than Andover.
British Wiring- "correct" wiring hardware and tools. I've had mediocre luck with their crimp on bullets breaking, so may suggest tracking down the brass version somewhere. The rest of their hardware is fine.
Cycle Terminal- Great wiring supplies if you don't care about using Lucas bullets. Also have crimpers for the ring and spade connectors BW sells, but doesn't have a crimper for.
British Fasteners- I've ordered from here, but honestly would not recommend. They messed up a hardware order and were completely unresponsive. If you need BSF or CEI hardware, order direct from the UK.
EVBC Ebay Store- Have had a lot of NOS Norton stuff recently at a good price. I think they purchased the inventory of an old Norton parts distributor.
SMM Motor Co- Also have an eBay store. Cheap pattern parts, good for basic stuff, hardware is sub par quality. No brand names, but lots will be EMGO which is pretty decent for headers, stanchions, etc.
Richter Machining- British specialist machine shop that will ship. Did a great job on my Triumph. Get parts in early because he's usually booked a few months out.
Feked.com- mostly pattern parts, I got some stainless rims from here, and they were good. I think Devon Rim Company is the actual manufacturer.
Amal carbs are all over the place if you need them. Anywhere from 600-850+. I got a set from Classic British Spares on sale last year.
Classic British Spares- Expensive Parts, very fast and responsive machine work. Will grind followers.
Eurotrash Jambalaya- Good selection of upgrades and Stainless bits, USA based.
