I found this new 32/36 DGV (manual choke) on Ebay. The listing says it's for a Toyota Landcrusier/FJ40. Unless there is some real change in the casting, it should be easy to change jets and such for the Opel (if you have a tired 32/36, then you already have that stuff). It even has the fuel inlet on the correct side. I don't think the DGV can be converted to electric or water choke.
It would be wise to get the suffix numbers off the base, though, and compare to the Opel correct Weber.
Anyway, for a Buy It Now of $150, plus $15 shipping, a new 32/36 doesn't come any cheaper. Just make sure it is new and not 'new' rebuilt (doesn't look like it).
eBay Motors: Weber Carb 32/36 DGV New Fits Land Cruiser FJ40 et al. (item 160231295048 end time Apr-27-08 15:43:26 PDT)