D hole plate to fit SO-239 bulkhead hole - SO-239 to BNC conversion


Does anyone know of a source for these?

I used to buy these from Oak Hills Research, however with Marshal Em's passing you can not order from OHR.

It is just a plate with 4 screw holes spaced to match an SO-239 bulkhead fitting and a d-hole in the middle to fit a BNC bulkhead.
There are other ways to handle this conversion but boy does that little plate make it easy.

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