wheel stud problem...

hey fabo, so i have a 73 duster with a 73 scamp k member that came with the 10 in 5x4in pattern i started noticing my wheels wobble n the shop i got to found out my rims rubs on the drum n the least expensive way to fix that was buying spacers so i did now the problem is the studs.. i need a 7/16 stud with a .572 knurling but it has to be 2 1/2 in in length not the 20 thread studs i keep finding. is there any car or truck that has that size but with longer studs to accommodate the spacers?? i could not find that length. any other ideas/fixes welcomed n appreciated