I was at Hassig in Switzerland a few months ago and purchased several new mt5 to MT 4 reducers and I believe he had a MT 5 to B32 adaptor but unfortunately may be difficult to have them search for it. Christian died last year and his son Daniel had taken over. Very easy to deal with. I dug through many many drawers and boxes in the basement and his other warehouse so its going to be a hunt, I saw many MT adaptors in various locations. In Christians office there were a few boxes with the adaptors, maybe have him start there. good luck