Possible lead might me
www.epsparts.com if that works and Randy Steele is still there, a lot of people on the W126 coupes list including me, used him for W126 stuff. Great prices, well packed and cared enough to make sure a few extras, like washers etc and everything needed to install right were included, I was impressed
(nb) Prev owner put the eibachs on my car. Shop was Stuttgart Automotive in West Los Angeles
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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...
1995 E 420, 170k "The Red Plum" (sold)
2015 BMW 535i xdrive awd
Stage 1 DINAN, 6k, <----364 hp
1967 Mercury Cougar, 49k
2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive
(sold)