Hopefully! I have just gotten back into O scale 3 rail! I am not sure where to find parts , if available . But am ready to do the next best thing and look for Replacement wheel sets with high rail flanges. as far as couplers go, A passenger train is one unit and really don't need working couplers. From the Beaver tail to the head end car I plan on using dummy or O scale Kadee couplers , and as right now, will only use a lionel style coupler on the head end car where it couples to the engine. This solves a lot of problems! I am willing to share any parts or info (suppliers) with you at any time. Dave
one note the Hiawatha Weaver trucks were different (side frames) between the 1934, 36, and 38 style cars
