I was looking today, and see the import bd-50s are pretty scarce unless you use eBay or something.
I’m failing to remember which is supposed to be better:
https://www.ebay.com/itm/354678504169
or
https://www.ebay.com/itm/165551504234
I think it was the second one, but my original insight into this came from a forum that no longer exists, so I can’t look it up.