There's something oddly anachronistic about making a regen set based on transistors and ICs, when this is a design whose main advantage is requiring a very small number (usually one) of active components. Here's a tube-based example:
Neither of these radios appear to be superregens though.
Daniel Wissell, N1BYT, “The OCR Receiver,” QST, Jun 1998
and "The OCR II Receiver" QST, Sep 2000.
Since the search engines have gone AI finding things like the June 1998 issue of QST has become impossible, for me at least. Maybe you have better search fu?
The schematic of that article is reproducer in this HP/Agilent App Note:
"Overview of High Performance Analog Optocouplers" http://promvpk.ru/Catalog/Document/5097b0fb118d6519949fe8a3
QST screen shot of shcmatic:
https://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/...