Check out www.redneckcycles.co.uk or do some research using various search engines such as www.dogpile.com I found a few good sites while looking for custom frames to shove a Honda Magna 750 engine in. Try searching for custom+motorcycles. Good luck, and good building. Most people donĀ“t realize that Cafe racing started with people building their own frames, and modifying engines and such,,,,,,,, the beginning of custom bikes and racing!!