I got TXadvance up and running and am very, very glad I did. It is exactly what I was looking for. Gregoire was very helpful and responsive, so I thought I'd come back around and post what I will be rolling with now. I'll include links for others who might be looking to source the hardware in the USA. Tremendous product, can't wait to get it out in the field. I used the antenna from my Src for the pic, but have supplies coming in this week to make some just for TXadvance. If I knew what I know now, I would have just ordered the stand-alone SDR without the antenna kit. I suppose the other antenna's would be useful if I ever want to use the SDR for anything but this app. Had to make a very minor mod to the tablet case to get the adapter to fit. Took about 20 secs with a dremel... because I'm slow.
First.. the list....
https://www.walmart.com/ip/Restored-Samsung-SM-T220NZABXAR-Galaxy-Tab-A7-Lite-8-7-Tablet-32GB-Memory-w-Bonus-Book-Cover-Dark-Grey-Refurbished/252683274
https://www.amazon.com/dp/B0969FXR7Z?ref=ppx_yo2ov_dt_b_product_details&th=1
https://www.amazon.com/dp/B01GDN1T4S?psc=1&ref=ppx_yo2ov_dt_b_product_details
https://www.amazon.com/dp/B07CVX3516?psc=1&ref=ppx_yo2ov_dt_b_product_details