There is a lady in Kangaroo Flat, Central Vic, who used to have a business making replica plastics for all over the world (as well as luxury yachts). Last time I spoke with her, she was 'missing the smell of resin' and has started making a few side covers again for selected people... I'll ask her if she has the molds for SL100s - if not, maybe someone could lend you a pair to make a mold from?