i think i still have some of the gauze in my tennis bag, it has been there since 1980.
You can still get it. Unique, the company that makes Tourna-Grip, also makes gauze grip tape -- it comes in black, blue and green. I got some, for old times' sake, because I used to use the blue stuff all the time on my old Wilson Sting. Now I can't figure out why I liked it. It's got a rough feel, gets sticky in the heat, and it becomes unraveled so that little strings hang off the grip. On the plus side, it only costs $1.99 a roll, so you can get some and let it fuse to itself in your tennis bag for cheap.