shock confusion

[zonki00]

I am trying to find a set of bilstein 5100s for my 99 4x4 with factory 2in rear blocks and a torsion crank. I called 4wheelparts and they said bilstein doesnt make the 5100s for my application...which im pretty sure they do. Does anyone know the part numbers for front and rear bilstein 5100 shocks for my truck?

 

[cr_the_machinist]

Bilstein only show 4600 series, no 5100's.