I have a set of used (just came off) Vanagon springs for sale.  Off a '90
Westy.  Ride height was 15 1/4" LR, 16" RR before they were removed.  Fronts
were 14 7/8 " LF and 15 3/8" RF.  Remember that in '90, even on a Westy, the
ride height was a little lower that in some previous years.
Anyway, for sale, local pickup only (I'm in Lynnwood, just North of Seattle)
$50 for the four of them.