Long Shaft Motors Available
For those curious, I just found some long shaft motors for sale on eBay. Should solve the problem and the output shaft being too short. I'm not exactly sure how they will fit- but it will be real easy to cut them down if they are too long.
part number is FC-280PC-22125
ebay link is here
Old thread but I just wanted to say that these motors worked perfect.
The only downside is that you don't have the knurl present on the original shafts to retain the gear and the gear is a slip fit on the new shaft. I used a healthy amount of superglue to retain the gear for now, but if that fails, I think some green loctite 635 will work. It has a very long cure time though, so that would only be a solution if you can spare 24 hours for the latch to be out.
If you have a caliper, the gear sits .159" down from the end of the shaft.
As far as the electrical connections go, I pulled brushes and the wires soldered to them out of the motor and snipped the ends off of them. You can then push the remainder into the slots on the side of the motor. They're retained well and there's no need to cut or extend the already short yellow wire coming off the board in the lock assembly.
I should have taken pictures to better illustrate, but I was paying more attention to getting the job done.
I had tried the cleaning in the above post but my motor was too far gone.