Alot of different brands now do canted footbeds, Rome targas I like, ride does them as does k2 and I believe button cartels have them, I'm sure others do also, maybe try the Rome 390 boss depends on riding style I guess, and I misunderstood but canted should help with both legs.
Effectively it lines your ankle up with you leg so it's the same as if you were standing straight up, imagine standing with you legs wide apart, now you can see how that would stretch the muscles and ligaments/tendons as your feet would be flat but you legs would be wide. Now imagine standing at the same stance with wedges under each feet that lined your ankles up in a neutral position equal to you legs, that's why it takes pressure off knees and ankles aswell as outside leg muscles such as the peroneal and ITB (upper outside thigh from hip to outside of knee).
I would def try canted footbed aswell as maybe seeing a podiatrist about getting some custom made full length orghotics, these more than anything help aleave shin, knee and hip pain and you may find your feet have alot to do with your problems.
my names's Petey and i have gigantic balls