Hello All. My rear sway bar is missing and so are the mounts that attach to the body(torn off prior to my time with the car). My goal is to maintain the original sway bar sizing for now (20mm F/ 18 mm R) while stiffening up the torsion bars. I was wondering if you could help answer the following or give some insight
1. Is it more cost effective to source an original 74-77 rear sway bar or go with the more available SC sway bars + custom endlinks?
2. Is there an off the shelf solution to mount the SC style rear sway bars to the ball pin style trailing arm that doesn't require drilling in to the trailing arm, or welding two different style endlinks together?

'74-'77 vs '78 and later Rear Sway
Source: Dieter's Repair
I am in the middle of sourcing parts for my '75 911s suspension refresh (bushings, torsions, dampers) and your help would be really appreciated!
Ed