Something to remember there were only about 800 Stallions built total. Out of that I have only heard of 2 that tried to have the ECM worked on. Only about 100 or so Stallions ever joined this group. So not many people to draw from. I believe what you already have been told is about it.
A new Stallion has not been sold in 11 years. Parts from TBMS a sub division of Motor Trike out of Texas are scarce. Not much there. Unless you can find someone to try a mod of their own you will probably not find a canned program out there.
Good Luck
Stallion #406 // 2013 Tri-Glide
If you got to ride, ride in style
Stallion #378
Suzuki Burgman 650
You know despite what the internet says about scanning and just disconnect the battery,
That is Bad JUJU
The drivers of the computers and files know way more than you think
The only way to fix this is a scan in real time by driving and recording the info
Nuff said,
Nuff Said," Were Burnin Daylight, Lets Ride"(Sober 37 years)
Current ride : 2021 FREEWHEELER M8, oldest ride 1960 FL