detinator

I just bought a 98' k2500 4x4 reg cab, with a 350. It has been well used but i hope to bring some new life to it. The previous owner must have had something against safety, as he decided to cut both driver and passenger seat belts. I have been looking frantically to find replacements but to no avail. I cant seem to find anyone who knows what years (any/all 88'-98'?), or cab style that will work in my vehicle. I need to know specifically what years will interchange and if a set from an ex cab or sub will work in my reg cab. Also if anyone has access to a tan set that they know would fit im willing to pay for them. Any help would be greatly appreciated.