A reverse K99 would be interesting... 2 or 3 years of R01 type funding to wind down followed by 2-3 years of funding for supplies as you are hosted as an emeritus professor - and ineligible for future grants as a PI
My postdoc advisor is an advocate for the “post faculty fellow” positions and in theory it sounds like a super cool idea. That being said if anyone is wanting to do one in my lab, Please email me a CV and cover letter.