Interesting small format table, I've not seen one before but it looks like it was included as part of a minisystem. From what I can gather it has a straight tonearm, so the headshell that you've pictured will not work, even if you could find one without the bayonet fitting. Most straight arms will use an angled headshell, and these are often manufacturer specific, so you'll need to look for a second hand Yamaha headshell, unfortunately.
Here's one I found, although I'm not sure that spending that much on a late 80s deck that you haven't been able to listen to is a good idea.
No worries, good luck with the hunt!