The window regulators from a sedan will work in a wagon, front and back. While the rear doors are a tad different I believe, the regulators are the same. I know this because I have the regulator from my 77 300D in my 85 wagon (rear passenger side).

And while you may get the parts to bolt up, never consider doing away with the rear hydraulic suspension. It isn't that complicated, parts can be had used which don't cost that much, and the ride is tremendous with a working system.
Others who have converted are rarely ever pleased with the results. I remember ONE person saying it was "acceptable" only. Not near as good as working SLS.

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John