Sir you have two posts on this forum, one lazy and one nasty. Let me help you, first humbleness and kindness go a long way, second, if you did indeed google search as I suggested you would see that the current controllers from Warm n Safe and Gerbing all work with your very old Widder Vest with the use of a very simple adapter which converts SAE to COAX.
Allow me to do a bit more work for you, since you so kindly asked, sites like Warm n Safe, Cycle Gear, Revzilla and Rocky Mountain MC all sell SAE to COAX conversation adapters as well as wired and wireless controllers.
And since I'm feeling so kind, should your vest not have either an SAE nor COAX plugs then a simple cut and solder of the aforementioned plug would also meet your needs.
You are most welcome; next time, maybe join a forum and introduce yourself instead of just looking for help and then poo pooing when someone, despite the jest, pointed you in the right direction.
ButI suppose you are right, I know nothing and haven't been able to help you....twice now.