Badger Graphic Sales, Inc. (badgergraphic.com) has Fuji Provia 100F in 5x7; I have ordered quite a bit of it. You may want to order it sooner rather than later because it will soon be unavailable. Ask for Jeff.
Too bad 5x7 is not as popular as 4x5 or 8x10 even.
Plan A: Check FreshStyle, although they are more oriented towards black & white.
Plan B: Buy 8x10 slide film and cut it down in the darkroom. [Not all that cost effective}
Plan C: Sell you 5x7 camera on eBay at a high price using the words: "Minty", "Rare", "Hard to find", "Antique", "Valuable", and "Highly Desirable", [only if you will be able to look at yourself in the mirror later on] and use the money to buy the 8x10 camera of your dreams. [Not what you really wanted to hear. ]
Exactly. And the format is half as much per shot as 8x10, cameras are smaller and cheaper. For enlargement, image quality between the two is all but indiscernible in everything but the most critical situations, etc., etc. The only big advantage I see in 8x10 is in the area of contact printing.
The last color neg film in 5x7 (Portra 160NC) is only available in 30-box cases now. So, get your seven or eight thousand dollars and your freezer ready if you want to shoot color negs.
When I ordered from Badger, they indicated that it was the last order from Fuji. I've since been told by a pro lab that they believe Fuji have ceased production for all markets. (If they're wrong, and Fuji are still producing it for the Japanese market, I guess it could conceivably be available through Japan Exposures in the future.)
I'm basically assuming that this is "last chance".
This is not for now, and would be more relevant in the future, but Kodak has been extremely accomodating with cutting their currently avaliable sheet films down to special formats. Of course, there is a substantial minimum order quantity, but it's better than having filmless cameras! I would contact Badger to see if they'd be willing to handle this for you (and all of the other 5x7 E-6 shooters).