I went down this same rabbit hole for a pre '97 panda to drive around Italy and then ship home to the US. Here's what I worked my list down to.
Must have
4x4 - They're all the same 4x4 system as far as I've researched.
Made after '92 or '93 with an 1100 engine - biggest engine and fuel injected starting in '92/'93 so you can worry less about gas if it sits for a while.
Double sunroof - This was the hard part. In my searching these were the least common and sold the fastest. Half or more that I saw had been restored and were asking $10k + which was more than I wanted to spend.
I waited around for one that was pretty chewed up for 2.5k and I'm working through cleaning it up.
I wish I had found something cleaner, but I am glad I got the sunroof, it's an ungrade you'll notice more while driving than any logos. The average passenger will also be more impressed with the open roof too if that's important to you.
On mine the sunroof seals pretty well, much better than my door window seals. You can get new cloth sunroof kits on Ebay easy. The metal frame of my sunroof is badly rusted and I haven't found replacements online so that's something I would check before buying. I think most of the other sunroof parts are still available, though you might pay a premium since they're less common.
"Tetto Apribile" is Italian for sunroof if you're looking for parts.
I opted for hunting down a sunroof car instead of a special trim.
If you want special trims the Sisley is the go to. If you don't care about the canoe logos, and maybe nicer upholstery, just get a country club.
Double sunroof I think was an option on most 4x4 trim models I think, so you could get a Sisley with a double sunroof if you can find one.
Side note - I've never seen a mint/teal one with the double sun roof, so I don't think they made those.
The trim I thought was the coolest was the val d'isere, it came with bullbar, lights, and graphic treatment depending on the year, mostly in red, but a few in blue, and black. Only sold in France, so they're harder to find elsewhere.
I go back and forth on whether mine will make the journey to the US in a couple years when I leave.
Have you gotten any quotes for shipping a Panda back?