cerullo.com
industrialseats.com—a couple of aftermarket seat manufacturers.
I couldn't find any reproductions with the quick search I did.
If you have the stock bucket seats already then restore those. If you can't find them in recoverable condition at the junkyard, or through an online salvage company, or eBay, and if your Craigslist "wanted" ad hasn't worked...
Or if you dont want to do all that...
Then call an interior shop, or go online and look one up. Tell them you want new (or new looking) seats, and have them find the seat and/or restore them as well.