Gosh. I don’t think this exist…
I know it exists, sort of. Modwright offered a modification of the well regarded Cambridge CXN V2:
https://www.modwright.com/modifications/cambridge-cxn-v2-tube-modification.php
https://forum.audiogon.com/discussions/cambridge-audio-cxnv2-truth-mod-tubes-make-all-the-difference
Problem is, Modwright has discontinued the mod.