Folks who wanna be Taylor Swift and Travis Kelce can play make-believe on Halloween -- and it's a lock that lots of people will do just that, much to the joy of one costume shop raking in the dough.
A rep for 3 Wishes, an online Halloween retailer, tells TMZ ... their Taylor and Travis-inspired getups this year are far and away the most popular costumes, as people snap 'em up in droves. So much so, they're completely sold out!
Customers have been able to double-dip a bit, up to this point -- 3 Wishes has had 2 different TS costume options .