I don't have parts to trade, but I was looking to do this at one point so I did some researching. List your year of the bike. If you have a 2003 to 2005 you only need fork tubes and rear shock. If you have 2005 or newer you will need the lower triple clamps as well. All 2003-2005 Buell XB's have 41mm fork legs, and all years of SCG or "low" XB's have 41mm forks as well. But in 2006 and newer the fork tubes grew to 43mm on all XB9,12 R and S models.
~Mike.....