It's not easy to find any modules from this time in a collectible-grade condition. The covers weren't as resistant to wear, and they were probably thinner than previous modules. I don't think this one had a particularly large print run, or a lot of them were sold, as it's not as common as other modules.
Since you've mentioned that you consider fine condition to be collector's grade for yourself, you should be able to find one eventually, if you keep looking.
I did check on current and past listings on eBay, and you are certainly right about what's been listed and sold recently, with the exception of this one, which was definitely collector's grade, but it sold for a LOT:
** expired/removed eBay auction **By chance, here's one that I think could work for you:
** expired/removed eBay auction **It looks like it's in
FN condition, and the seller will even consider offers. Maybe offer $40 and see what happens.
Good luck!