I stumbled across Theiss Research, was (is?) a US organisation for independent scientists. They look to have been most active around 2005-2010 and seem to have received a decent amount of grant funding.
I’m posting a link to a wayback machine archive from 2016 as their current site isn’t well maintained https://web.archive.org/web/20160325153711/http://www.theissresearch.org/
@alex.lancaster, have you heard of them?