Just sold my old B6000E a few weeks ago and it even had the adapter for the PTO. Good luck on the converter, it is a very rare item. Hub City built the adapters but no longer able to sell them. I was however able to obtain "parts" and to my surprise was able to build a complete adapter from those various parts from hub city. This was approximately 10 years ago but may be worth a simple phone call to Hub City.
Good Luck!