Well, ECM Kings immediately referred me to Memo, or meho, or something, and I called him--- he is in Houston-- 281-224-6552, and he said that he could only do it with permission from BlueBird, which is apparently almost impossible to get.
His plan B was to find a vehicle that came with 6 speed unlocked from the factory, (a truck maybe??) and get the CIN# and vin number, and he could do it that way. (Clone it?) I suspect it would need to have the exact same engine as my bus for the calibration to be correct. (Mechanical DT466)
To steal a line from Pink Floyd-- "Is there anybody out there?"...
Thanks for bringing up this possibility-- and older used motor home donor...
Had not thought of that...
Thanks for all the info. I have emailed PCMperformance, and have began my search for a TCM from a donor vehicle. There is a large motorhome salvage yard in southern KY, and they have TCM's from older units, but they want a part number-- which I don't have . My unit does not have 6th unlocked, so giving them that number will not work. I have my "thinking cap" on though. It may end up that changing the rear chunk from a 6.14 back to a 5.XX may be as cost effective. It also has 10R22.5 tires, and 11 tires would also help. I can cruise at 60 pretty effortlessly so I am not in that bad of shape. Patience... at 65 years old... drove it home 2100 miles at 63 MPH and it did fine.
per website, 500KB ROM WTEC3s = part number 29537291 or higher. https://pcmperformance.com/TCMs.html
so that is what yours needs to be, and if not then that is what you should look for. and it should be fully functional, tested, working WTEC3 unit.
but there are other vocations which you may not want.. ie if it requires an inhibit input for say a bucket truck where the transd expects a circuot to close from the bucket.. program that into a TCM where the wires arent even connected and it may result in you never getting out of neutral..