Total posts : 45366
The Talking House ATU is set up as the external antenna for that unit, the connecting cable is standard CATV 75Ω R6, not 50Ω. I’d think some mods would need to be dealt with in either of the SSTRAN units. Not sure what would be efficient.
Other than that and your sub-par experience with Antenna Guy (I thought he quit making them), the only other pre-made antenna I know of that could work (but will still require fine tuning) is the Isotron talked about in another topic about a few days ago, the one made specifically for Part 15 AM.
AFAIK, no one else builds and sells separate pre-built Part 15 AM antenna systems. It’s a very tiny market.