ORIGINAL: oppie

I'm using a DLE 30 with side carb. The instructions call for using 13 spacers and with the standoffs that came with the motor you need a 10-32 x 4'' socket head bolts. I would like to know where to get this bolt. I have checked all the usual hardware retailers and no luck. I then did a Google search and came up with nothing. Have any of you guys gotten this far with a side carb engine?

''Test fit the engine with the spacers and standoffs using
four 10-32 x 4'' [102mm] bolts and four #10 lock washers
(not supplied).''