<VV> Socket head turbo screws

[Doug Mackintosh]

Does anyone know a source for socket-head (allen head) screws to bolt the Carter YH carb throttle body to the carb body? I am getting tired of trying to retighten the slotted screw on the bottom side. I think it is a 3/16-28 thread 1 inch long. 

Thanks! 
-- Doug Mackintosh
Corsa member since 1996
Corsa/NC member since 1996, Virtual Vairs member
Corvair owner 1969-1971 and 1996-on