Mike,
Just recently I had a very special MTH tech who has some close ties with MTH, try to locate a drive block (chassis assembly) for me to a Hudson # 20-3059-1 and unfortunately for me there was no block available. The flange on R-3 driver was bent/cracked and Midge sent an e-mail back saying that she regrets to inform me that she couldn't help out. I want to again thank that tech for his help and he knows who he is because he always goes above & beyond. But, I'd also would like to say that anyone on the forum who may have a drive block available, to please contact me on my e-mail, located on my profile. Mike you were blessed to have that part available to you. Glad to hear that your loco has gotten a new lease on life. Enjoy!
Steam Forever
John