hmnn,
Looks like they updated their website.....but the 80-100's are no longer on the list. I would definatly inquire. if you had a back order unfilled for so long I would be very concerend. (i never let anyone charge me for something that is not on the shelf for reasonable delivery) they should give you a full re-fund. I would offended at an offer for "credit" (but would take an upgraded motor for the same price as the original

)
Example: Grizzly tools, I have some odd gears ordered for metric treading they don't stock in the states, they will not charge the card # I gave them untill they have the part picked & in the shipping que. just got a another note by mail today that they still don't have the parts in hand & inquired if i still want them, been 6 weeks since i orderd)
The 1st order I placed with leaders hobbys was a back order.....they cheerfully refunded my money when I explained my disapointment. ( I also politly explained that if they didn't have the transaction re-funded in 2 days, I would take action thru paypal wich still had plenty of time left for a claim)
You can get these motors from Sky hobbies out of sinapore. (for a higher price) Leaders has been back ordered for 2 months now on these also. doesn't look good.
Hope it all works out for you.
T