Good Holley Jet Source

I'm working on my Holley Avenger 770 using this thread as a guide: Power Valve Selection: The Definitive Answer I was directed to it on my thread about taking my Duster to the track.
I'm going to need some jets, but I sure won't ever need all the jets that are in the the sets that go from 64 to 99.
It has 72's and 76's now. Is there a way to buy some around those sizes? (Probably leaner after I re-work the PVCR's.)