Just curious, why are you not "a fan of" bell boots?
I just don't understand what your issue with them could be...
I guess it just depends on WHY this horse is having the issue, but a reason to get rubber bell boots instead of just boots with the heel protection is if the horse constantly forges (like mine). Its not only when she is under saddle or in work, she forges just as bad when she is walking around in the pasture.
I would personally rather have the rubber bells on her in the pasture than some other boot that you have to strap onto her and costs probably 5x as much.