Last time I looked
Which was a few years ago
Both the OEM foam inserts and covers were available on ebay Poland, It's not cheap though, I didn't do mine as I couldn't justify well over £100 from memory
You have to translate what you want to search for into Polish first and use the site in Polish
Then once you found them you can use the auto translate
This would fetch your original seats to as new
There's quite a lot of work involved, espescily if you do the back as well
If it just the divers base bit, and your seats aren't height adjustable then it's only two bolts to swap it for a passengers, 5 minuites
Or second hand bases are cheaper and easier
The original OEM seat covers that go over the original seats are available from Mopar at £185 for the fronts only
A lower quality but far cheaper ebay alternative can no doubt be found
We just need to know which way to go before spending time searching,
Budget, time, experience