I talked to someone I've worked with in customer service at RecTeq and they are selling me the BFG/RT-1250 auger motorIt is worth a try to give them a call.. It does fit right in.. I think the others the hole is not in the right spot on the shaft so you have a modify things a bit like the fan blades or possibly consider a new hole. I got lucky and got one from a forum member who went in another direction with a built in unit instead of the Bull and never used it. That was after Recteq pulled them off the site. I have seen where they supplied them to folks who were not happy with the heat up time so they might if you go about it that way?
Plus @Jigsaw is pretty sure the 2.5 is not really a 2.5 . Edit - I Think I have that right? I know there was talk about the 2.0 being 1.6.
Once I get it in and do some testing, let you all know.