Need 15" wheels with 5x4 bolt pattern

100mm wont work, itll "fit" but it will wallow out the holes and ruin them in short order as 4" is more like 101.6mm. Try Centerline. they make new autodrags in 5 on 4, so does Cragar S/S and there are a few niche manufacturers that will custom drill your pattern. Check this site for some 17's that come in 5 on 4.