i have a c. 1960 montgomery ward riverside (basically a mobylette av88). its missing the right side cover, which is the side with the petcock. mine is a chaudron (rust/orange) color model. ive been waiting forever for the right one to turn up on ebay france, but to no avail. many close calls, btu im yet to see the actual right piece show up.
anyhow, maybe youve got a parts bike that youll never get up and running, but it has a good side cover that youd be willing to sell?
see my profile for pic of bike.