Joe,
I bought jet kits from these guys ... they seem to have the best local prices I've found.
Top-End Performance
7452 Varna Ave
N.Hollywood CA 91605
(818)764-1901 (818)764-0155 fax
e-mail: topend@racetep.com
http://www.racetep.com/weberX.htmlAsk about smaller venturis (28mm for a 1911cc) ?
I'd recommend getting a 737-xxx kit (see web site for particulars) with multiple choices for main and air correction jets too (approx $90.)
Another local is European Motorworks in Hawthorne (George)
European Motorworks
13224 Prairie Avenue
Hawthorne, California 90250
Telephone (310) 644-8038
(800) 722-8678 in U.S.
http://www.europeanmotorworks.com/