Welcome back, old friends are always welcome! The photo's you posted don't seem to be relevant?
The QA1 part number changed but the double adjustable is the DD501 (bushing) or DD502 (Poly), single adjustable DS501 and DS502 respectively. The Double adjustable are $244.50 ea at Summit and single adjustable $169.50.
The bushed shocks will require a spacer either side of the eye and most aftermarket shocks will have a 1/2" dia eye, not a 12 mm (0.471") Pantera shock bolt dia.) so there is slight mismatch that the stepped spacers take up. I can send a drawing if you go that route and need to get the spacers made up. You can of course drill out the shock mounts and use a 1/2" dia bolt.
I am running 550/450# spring rates on the GT5 and would opt for 450/350 on the L when I get to it. Springs are $51.75 ea so not terrible cost if you want to play around with a couple spring rates.