Where else would I get replacement rubber washers for bolting my tank back on? Even sez so on the packaging.
You might try these guys: http://uralnwco.ipower.com/store/ They have exploded diagrams of all the major components of the ural. Or call Heindl: http://www.heindlengineering.com/Online_Store/Ural_Parts.htm I've ordered from both and have had no issues.
Sidecarists are a resourcefull bunch. I needed 2 body rubbers for my Velo, had this; Had one of these; Grabbed my holesaw and made 2 of these;