Bolt in Sprag For 904 Trans

Does anybody know where I can get a bolt in Sprag for a 904 Transmission? Don't seem to easy to come by..

Tranny is at Trans shop and they seem to be having a problem finding one, scary....

Anyone know if they have an Ultimate Sprag for the 904?
Not sure it needs it. 330 HP 360 with and 8 3/4 rear end with 488 gears..

Thanks