This would have been a single Pittman motor....dogbone and coupler set up....parts are as scarce as hens teeth....I hope you have the coupling driveshafts at least....I have a lot these parts in stock, however, they are at a premium as supplies are extremely limited......if you’d like to send me some pics of it with the shell off, and we can go from there, or you can contact Midge at the parts dept. of MTH as they are still selling/supplying parts.......
Pat