You'll need to decide whether you're looking for a 3 point or subframe type backhoe. The 3 point ones are generic and could be made to fit most tractors, but are mainly for light duty work as the 3 point mounting is not made for the kind of heavy loads and stresses a backhoe can place on the tractor. The subframe setups are much more rugged, capable of heavy work without harming the tractor, but the subframe assemblies are not generic and must be specifically matched and installed on the tractor.
If you search the Kubota Buying/Pricing and Owning/Operating sections for "
B7510 backhoe", you'll find some informative reading.
Of the brands you mentioned, I would look first at Woods, since it is an implement manufacturer whose backhoes are very popular, solid products. They offer both 3 point and subframe backhoes that would fit a
B7510. If you go to the Woods Equipment website, you can get details about their current models. Occasionally an older one pops up for sale, but many of the used ones I've seen were very old or worn out. You don't often see a good subframe BH for sale separate from the tractor it was on.
Jinma and Branson are tractor brands that compete with Kubota, and - I'm speculating here - would be unlikely to offer a subframe BH product made to be installed on a competing machine (You wouldn't typically find Ford accessories for sale at the Chevy dealer!). They may offer 3 point BH's that could fit, of course.
Other popular brands names are Bush Hog, Rhino, Bradco and Koyker.
