jrn - head over to Grainger's website and order a replacement blower before it is too late!!! As a plus, in my exeriences, Grainger has extremely fast shipping.
I got a PSC (not shaded pole) blower for my koker before this winter and am currently using it with the OEM sitting as back up. I changed it out because it seems like other members of NEPA feel the PSC blowers are more dependable and energy efficient than the FASCO shaded poles. Take the part number of the original FASCO blower installed on the koker and look up the replacement at the electricmotorwarehouse site I listed below. I believe the replacement is Dayton # 1TDP3. Just make sure the specs are similar and especially that the outlet flange is the same diameter so it fits in the koker's sleeve.
The following website gives a list of replacements for Fasco blowers : http://www.electricmotorwarehouse.com/f ... blower.htm
This website gives the specs on the TDP3 : http://www.grainger.com/search?searchQu ... sst=subset
If you get your coal bed going good enough, you can probably swap out the blower without even losing your fire.