Thanks for the suggestions so far.

I'm still trolling through eBay which displays pics of reasonably new R129 soft tops that appear as wrinkly as mine - some more so - so perhaps any hope of getting a smart-looking surface is impractical.

Ken Silver
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~1993 SL500, glistening blue-black on black leather, xenons, no headlight wipers (from choice).
~1991 Daimler, shiny grey on grey leather, best in country!
~1991 Miata MX5, sparkling BRG on tan leather, wife's (but my polishing)
~1992 Honda US s/wagon, black/grey
ex 350SL, 230E, 280E (and a lot of other makes not nearly as nice)