They are priced at $7.18 and come with metal wheels. The long coupler shank with the old NMRA coupler might be a close match to the IHC couplers. It won't be a snap-on affair, though. You may have to drill a different hole through the bolster and secure the trucks with a screw and nut.
Hello...I just picked up a pair of the Walthers GSC 41-N-11 (CIB) trucks Walthers #933-1069...and was planning to use them on one of my IHC passenger cars...they might work...although I haven't tried to fit the car with them yet....