I suggested that someone contact his son Kyle and ask if they are still available. I bought mine from Dwight several years ago and he was pretty well semi retired then. Gibbon Hot Rod Shop (gibbonfiberglass.org)
I think Dwight made an adapter that bolted on the back of a Model A or Model B bell housing that adapted to a T5, Correct me if I'm wrong. Oh and I have a Model B bell housing for sale
https://www.jalopyjournal.com/forum/threads/shoebox-flathead-to-t5-adapter-plate.625273/ https://www.jalopyjournal.com/forum/threads/dwight-bond-adapter-plate.989736/ www.dickspadaro.com used to have something similar or that one however Modern Driveline has an adapter kit listed
There is a Bond adapter plate for sale in the classifids Sent from my iPhone using The H.A.M.B. mobile app
I bought a 59 Chevy truck cab from Dwight Bond. At the time he lived in Gibbon Nebraska. However, this was almost 20 years ago. Looks like he still lives there. History of Gibbon (gibbonfiberglass.org)