Just coming back to this, I managed to get a Masterlink Distribution Box, one came up cheap on eBay. It’ll come in useful because I have decided to keep one of the Beolab 2000s I bought as a package with my Beolab 3500.
As for the Beolink PC2, I missed out on the one that was on eBay but another will come up, and I am just too curious not to buy one now! One thing I didn’t think of though – will I be able to get the software for it?