I guess since this is intended as a repository for the site. I'll start with something I threw together one night. After talking to an acquaintance and going off some pictures I made an NJT replacement style catenary, these are usually found around the NW corner of NJ and are only really used to replace damaged former DLW Poles. One of these days I'll throw in the double track version.
Single pole so it fits in naturally in tighter areas (
gig)where the double pole ones would be hard to fit. Comes in a variant that prints as one piece and a version that prints in parts. Suggest using the parted out version, made sure parts have location (Holes on pole correspond to insulators, arm "clips" into corresponding C shape on pole) so assembly is easy and there isn't any real guesswork.
https://www.thingiverse.com/thing:4908199