http://www.ebay.co.uk/itm/MAZDA-BONGO-2 ... 377wt_1110.
not a gen mazda one, or a blueprint one ive got those brands and have cut them up to see whats inside, just need one of these for the same treatment.
the way to tell the difference is the bottom rim, they are all different shapes when the ball bottom plate is pressed in and crimped.