Jeff50316
Just to make sure we are talking the same bit... you are talking about the bit to hand drill the flash channel with - correct?? not the bit to drill out the flash hole....
The flash channel in a CVA plug is normally 3mm, very few places in the US will carry metric bits - so you will need to get a #32 Wire Gage Bit. It measures 2.946mm - so you wil have to ask for Wire Gage Bits and then you want a #32 for the flash channel.
Probably the best place other than a good hardware store might be an Auto Parts supply store like NAPA. And pf course you could order one on line but it should not be to hard to find some Wire Gage bits.