Are you starting from scratch with a pin on bucket now and wanting to change to the quick attach set up? I had to do this a few years ago when I needed to add the PA30 auger. I bought a quick attach adapter plate that pinned to the backhoe this stays on all the time. This in turn mates with the quick attach buckets (late model), and other attachments like the auger and hammer.
If you are looking for new ears to put on an existing bucket you may have to cut them out yourself. The ears would not be too difficult to cut out from my experience. I built an adapter coupler for a members Bobcat auger a few years ago. So while I have the ear profiles for the attachment plate side I have not laid out the curve for the backside to fit a bucket yet. I do have an 18" pin on bucket to convert too.
Here is a picture of the coupler ears when I was making the adapter.