I had an 08 Conny with Murph's ProGrips and loved them. I now have an 18 Conny and find the grips very hard, I bet you know where I'm going with this. So I ordered as set of Murph's ProGrips and then proceeded to cut the original grip off before realizing they are heated... Idiot! Idiot! Idiot!!![...]
Thank you for not laughing...
I wonder if you could use some snowmobile heaters?I have used items similar to those on several of my bikes, they worked fine except they did not have variable heat, just an on off switch.
https://www.denniskirk.com/sports-parts-inc/standard-length-high-power-grip-heater-sm-12474.p5903656.prd/5903656.sku