I had no luck finding that washer I needed anywhere in town. I'll have to order one online, looks like the bike will be down for another week.
I did however find something interesting out. When searching around for the parts I needed I came across another '71 triumph bonneville for sale. It was a rare t120rv model, one of only 200 made. Then like a sack of bricks it hit me! Dug out my title and sure enough my is also a rare RV model. Here's an article with more info on this. T120rv article
This bike has just became the rarest vehicle I have ever owned.