I went down that rabbit hole after I purchased my BX2370-1. Thought I needed a hoe. Only ones I found that stated they'd fit were the Wallenstein & Bushhog which I believe are basically the same design. After I recovered from the sticker shock, I decided if I ever wanted a hoe, I'd trade up to a B2650 cab some day. In the meantime, I'll keep my collection of shovels that still fit my hands.
Can you mount/modify/adapt a Kioti hoe onto a BX2670, sure you can given enough time and $. But, if it were my tractor, I'd darn well verify you know what you're doing first. Good way to mess up your tractor in a hurry. That's one reason the 3pt backhoes have fallen out of favor. Too many issues.
Good luck if you decide to make that mixed marriage work. At least they're both orange.