Help! I need 3rd member studs!

Hey guys,

im missing two of the ten studs for an 8-3/4 that hold the third member to the housing with nuts...ive tried called the dealer with the old catalogs and he has a number for them studs but he cant get them in...ive also tried other fastener companies like papco as well and they dont have any...they are very similar to a nurled wheel stud but they are 3/8 inch instead of 1/2 inch...anybody know where i can get these things?