at 83mm your pushing the standard ford item, i'm pretty sure its only about 82.5 or something so off limits.
i agree on felpro being crap, my last engine needed 86mm and i was stuck and had to order felpro at great expense, the quality was very bad when compared with ford/payen gaskets imo
not much help sorry but away from 80mm or 2litre 85/86mm zetec there ain't a huge amout out there, correct me if wrong but i did have good look around