does anybody know what alternator the guys use on drag engines(the really small ones) aka pete page type

Dave , your usa contacts should have all the answers .
I went for a 45amp setup , you might want more ( 55amp ,75amp) .All so if you want a 2wire setup ( mine has 3wires , 3 is a tickle to excite it) Theres lots to look at . Look on ebay too.
http://www.powermastermotorsports.com 

Don't think you can go past Nippon Denso
Daihatsu charade - 1983 to 1987 45amps - 27060- 87701
Mitsubish , Suzuki samari
oem : 00211-141, 12v,45amp, (Barina ,Suzuki)
55amp Super Mini Denso ( Nippon), Fits Kubota tractors and others