T pasiones is likely what you have. However I have heard of T helleri also being called a yellow firemouth as well. Also I could see a common name of yellow firemouth being slapped on T sp " mixteco " gold. Pictures would help . In any case they are all great fish .
I am currently seeking T pasiones and wish i lived in yuor area so I could check out the fish at that store !. Right now have a few T ellioti that have recently spawned , T mixteco " gold" , and T socolofi . I would like to get some pasioens and aureus as well. Great group of CA's .
Good luck wit hthme hopefully you'll end up with a pair and some spawns !
HTH
Tim