Sorry to see you're still dealing with this issue Mark. As I know first hand it can be very frustrating. Like you my 3195 was more a sentimental piece as it had been in my family since new as I was very scared I would never see the engine again after sending it out. I seldom run the engine anymore as I can't keep the 2 front leading wheels on the track even on wider radius track. I'm not 100 % sure but I think my grandfather added these to the engine as he was a toolmaker. I have yet to see a 2-4-0 # 3195 engine. I have attached an ad for this train set from the 30's. I wish you luck in your journey finding wheels..
Jay