Hi all, new poster here. Lookin to buy some clubman bars for my 78 750k. I'm not sure what size to buy? I was told to get 35mm but I'm not quite sure if that's right becauses most bars I see for sale are 7/8" or 22mm. I'm a right? What size should I buy? Also If anyone can suggest a way to replace my gauges. They're beat up and broke. Thanks all!