I have the 39L yamaha top-case on my tracer 900 and really like it. Fits a full size helmet and some smaller items plus it looks good on the bike. I also want to be able to use it on my other motorcycle which has a grill-style rear rack. I found yamaha part no. 37P-F84X0-00-00 (universal mount plate) which looks like it would work perfectly but I can't find it anywhere online in the USA. Anyone have any ideas?