Your best route may be to sell the tractor and buy one with a loader. You could also investigate aftermarket loaders like Koyker or Woods but they don't come cheap.
I bought a Westendorf loader with forks. The loader is pretty standard and they manufacture the specific fittings to adapt to the B7300. It was about three years ago and I believe it was about $5K for the 54" loader and forks, but then another $350 for the dealer to install. I have been happy with the loader, but found that I probably have the forks on more than the bucket. If you want the quick attach feature, price it in with the original purchase.