From time to time I drop in on this thread...really nice trucks, gents

. I looked at maudib's page hoping for photos of the offset setup but all I found was BSG stuff

. I got to see a tail-stander GTO today which had a similar setup (quite a bit more difference actually) and I suspect it looks really good on a street Tundra.
Deaver has a spring-under conversion right now for the desert trucks, they could probably do a bit of a mod to their spring pack and you'd get a lowering pack with a stock shackle, spring under, and load capacity to carry a motorcycle or whatever in the bed.
Also, I'll have a u-bolt flip kit available for sale some time this fall, take a look at aor4x4.com, it's a very high quality kit and the bump stop is less than half the height of the stock bump stop, so you'd bottom out less with the lowering kit.
-S