There are three F1 specialist shops, and almost all bodies are made in Japan.
RC Mart
http://www.rcmart.com/rc_f-1_formula.php is easiest to deal with and usually cheapest, but have a limited range.
Banzai Hobby
http://banzaihobby.com/radio-control...rmula-1-rc-car has a wide range of bodies from Chevron, TRG and Zen Racing.
F1RCLab ttp://f1rclab.mybigcommerce.com/f103-bodies/ has tamiyas rereleased F103 bodies, as well as their own
60s style VF1 body
and a wide range of their own decals
http://f1rclab.mybigcommerce.com/dec...eatured&page=2
For Tamiyas current bodies not many places stock the old style shells, but JR-RC
http://jasons-store.highwire.com/ will usually stock them, such as the Lotus 78, Wolf, McLarens, etc.