MOST BIZARRE PROBLEM - CALLING OUT TURNTABLE DIYERS

I decided to unox and out together my Amazon Model One today and somehow, believe it or not I managed to mis-place/ lose part of the bearing (it's not even the ceramic ball - which is easy to lose) - in fact it is the inverted housing that fits in the platter.

The platter is 50mm think and I think is common to the Amazon Model One and Scheu analogue.

I was wondering if any of you know the details of the oem manufacturer, or where i can get this - better still how much is it going to cost me.

Yours (feeling pretty stupid) Lohanimal