Rear shocks are not the problem, I had some new in the box Mopar shocks, I chose the shorter pair for the rear. I sort of think they were B body.

It is the fronts that I am (and I am pretty sure the OP) having trouble finding.

My 98 GMC had a Belltech kit, 2" coils, 2" spindles, and a flip/notch kit, and had I THINK Bilsteins on it, Came with the truck, but I never replaced them, I have no idea what the number might have been.

Truck is gone, so I can't go look.