3mm HD comfort Foam would of interest, as the original seat covers are a bit rare and a good one expensive.
perhaps as its you trade take a look at offering an alternative?
if you wanted to get into another market, go on maxiscooters.com and look at the threads on seats for the Honda Silverwing, really great scoot ruddy awful saddle comfort.
could be a good revenue source offering to modify the foams as the skins only stapled on.
i'd get mates rates of course
regs
Alan