As far as I know you can buy them through Williams Soaring, but what a
waste of $400+...

-p

I contacted Williams Soaring not too long ago, as that wisecrack above
about the leaking kerosene was me, speaking from experience. They
inform me that they no longer carry the PZL compass, as they would now
have to charge over $600 to sell them at a fair profit. I remember
when these things came for free in boxes of Cracker Jack.