Yes the #7 backhoe is still made and it's probably because it fits on the 790 gear drive tractor still being sold. However, I think the 755 uses a different subframe than the 790 and you'll also need the right power-beyond kit to tap into your 755's hydraulics (if you don't already have that). You should check out the attachment build and price link on Deere's website. I was at least able to price the whole package out last year, before I sold my 755. Just be sure you're sitting down when you look at total package price! In fairness any of the aftermarket ones won't be much cheaper. Good luck in your search.