Yes there is.
Fritz's Bits in the U K sell fully adjustable GAZ coil-over kits for the E28. Contact them for pricing. Don't think they'll be cheap though.
Personally, I feel the kit is a bit OTT. I would settle for one of their re-valved Bilsteins and matching spring kits. Again, contact them for pricing.
While you are at it, think about getting a strut brace and polyurethane bushes. With all these fitted, yours will be one of the best handling E28s in town.