Alco dynamo

Postman dropped off this little Alco dynamo today.
Plan is to convert to something I can drive off other engines. I've had it motor up fine so not too much more than some cruddy bearings to sort.
Before I attack it does anyone have a JAP Model 3 or Alco featherweight in need of a dynamo?

Evening
Just found these images, is dynamo still around or did you use?
I have a running Alko and this would be good the fitment suits the drilling on the cast flywheel cover