Some time ago I've seen suspension kit for R21t in th B+G online-catalog. Then I've found dealer, and they told me, there's no such part # in their new (2004) catalog. Then I sent an email to B+G office and they confirmed, they "no longer carry suspension kits in their program". But they have produced it for some time. The other thing, they told me, was that they were using Kayaba gas shocks in their kits.
But local Kayaba dealers told me, they don't have those shocks too.
So I'm totally disoriented.
One more problem was trying to find Bilstein shocks. I've seen several 21t's, mentioned to have em, but tey're not in the Bilstein catalog!
What I know for sure, is that SACHS produces gas shocks for 21t.