Pinto grille was the same up to 75, changed in 1976. Headlights/fender caps may have changed with the bigger bumpers in 74, but probably not or very little.
Morgan Automotive Detail makes a 71-73 Pinto Wagon kit: http://www.madmodeling.com/store/ccp0-prodshow/71-73-pinto-wagon.html Motor City Resin Casters makes a 72 Ranchero: http://www.motorcityresincasters.com/72ranchero.htm
Also the "Trade Show" (swap meet, whatever, where vendors can set up to sell, mfrs can display) at GSL is only for a couple of hours on Saturday morning.....
From my experience manufacturers and big aftermarket companies do not venture to GSL for some reason, although John Grezcula from Round 2 was there in 2011 and 3013.
Albert Wallace posted a link to his Fotki of pics he took at this show on the "other" board. http://wwwboard2.spotlighthobbies.com/cgi-bin/bbs62x/webbbs_config.pl?md=read;id=63724 http://public.fotki.com/AlbertWallace/model_car_contest/2015-socal-nnlchats/