@LANTASKIyea I have foot beds from Sure foot... Since it has the custom shell, it has narrow last but it can expand.
Problem is that there are very few boots that have the flex and performance attributes I'm looking for with a wide
Your medial arch pain could be attributed to a few things:
1. Surefoot footbeds are not that great, in fact I have seen them cause more problems than solve (despite their creation process).
2. The moldability of your boot is limited to the partial Kaprolene inserts, meaning the rest of the shell may not be the right shape for your foot.
3. The Kaprolene in those boots has been known to shrink back a bit and this loss of width/volume could be attributing to the pain you are experiencing.
I would personally look into new footbeds before you get a new boot- a proper footbed that repositions your foot into the right spot might be all you need. Plus it will be good step regardless
Next, have your shell checked to make sure the Kaprolene hasn't shrunk back and that it is still a good shape for your foot.
If that doesn't work, look into newer models of boots like the Hawx 2.0 130. It features a wider, higher volume starting point (at least compared to your current boot), has a true 130 flex, and the shell/cuff/liner are 100% moldable to your foot (rather than partial, like you have now). That will give you the power you are looking for and the right fit as well.