I have the following 2"x4" springs available:
# Pairs Rate
3 - 900
1 - 1000
1 - 1100
1 - 1200
1 - 1300
2 - 1400
The were custom made for Penske by a company in England, so no, they are not Hypercos. Sorry, but all the really low rates left years ago.
$40 per pair, plus shipping vis FE.