As far as I know, No, and you won't find anything "Hi-Cap" except for the "extended mag" type which extends beyong the grip. If that's what you're after, fine. They're available.
But SA is not making a Hi-Cap for the 9mm Subby that fits in the basic grip. The best you can do is get a mag for a .40 cal Subcompact and use it in your 9mm Subby. I think it'll hold 13 9mm cartridges. The only potential adjustment required is squeezing the feed lips a little if the 9mm cartridge sits too high in the magazine.