I had good luck with Valvoline synthetic lube in my 95. Local parts stores didn't seem to have any GL-3, and I was desperately in need of a quick flush before the GL-5 ate it up, so I decided to try it. Even though it is rated as GL-5, it apparently has no sulphur, and my previously noisy, hissing, crunching AX15 has happily run for over a hundred thousand miles on a single fill of it (now over 260K). I would still recommend GL3 if you can find it, but this could be an alternative if you're stuck.
But I second the warning: do NOT put dino GL-5 in. When I did this, in accordance with the owner's manual, it was noisy, rough, and shifted badly. When I drained it out a few thousand miles later, it looked like liquid gold, filled with the dust of what used to be the synchros!