@marka I think buying a 6.5R from a shop that honors the 30 day satisfaction guarantee is your best bet. If you don't have a shop nearby that does that, Icewarehouse offers that. They will feel way too tight before baking, but from everything I've read, my experience with the TF9s and the data you've provided, 6.5R is most likely the size you'll need. The Trues are very thermoformable and are the closest thing to Makos currently on the market. I think the R's will be wide enough for you after baking if you're in D Makos, but buying from a shop that honors the guarantee would allow you to change sizes if they don't fit the way you like after a good bake.
Just have them baked and fit like SVH demonstrates in this video: