Females can also have yellow faces......... my Maui has a yelow face and crest......but she´s a Pied Tiel.......

You can try searchinh online for a breeder, I wish I could help more but I have no clue where you live, Í am also member on a bird forum where Tiel owners have clutches or young birds for sale....... you may wanna look there....PM me if you like

can you post Spike pics??