For coil overs, ZZP resells HTMotorsports, aka arrautmotorsports. You can skip the middle guy & get them direct, and buy the kit, with or without struts. The kit takes about 3 min each to assemble, and could be used with whatever modified (spring perch removed) w-body strut you like.
For struts, excel-g has a special handling strut, to my knowledge not available in gr-2. If you want to go real low & are worried about killing the strut, cut & thread the piston, same way some people without coil overs do.