I'm late to the party here, but wowweee! Congratulations on finding such an amazing 906 set! I hope you can get the timer issues resolved quickly!
I've heard information to the contrary, but there was a company here in Canada, Turners Timer Repair, who were still willing and able to repair vintage washer timers. Last one I sent in was about 2 years ago for a tune-up on my 55 Pulsamatic timer.