To have the right suspension travel, it's important to get ones the right bump thickness/depth.
Early genuine sw20 bumpstops have a deeper bump thickness than the later ones.
Later (92+) SW20 genuine ones are 35 mm bump thickness depth front, and 45 mm rear.
Eibach Pro- Kits give a similar ride height to the 92+ springs so the later bumpstops should be the ones to use.
Twos'rus have KYB ones that should fit, but I think they only supply the same thickness for F/R