Depends which catalogue you look at
For example, the 1994 brochure states 120, 135 and 150mm. But bear in mind what geometries we all ran (and I must admit I still do) on our XC bikes back then.
The road stem was produced in a 90mm variant (26.0 bar clamp), and in 1995/96 they introduced a 105mm, mainly for the emerging downhill and freeride disciplines.
And in 1997 there was indeed a 90mm 1 1/8" for a 25.4 MTB bar produced.
Short Zookas tend to command much bigger coin, typiclly £90+ as there were much much fewer of them produced (and hence harder to find), and its also what everyone now wants for their aged backs.
Being so vulgar as to hijack my own information post with a commercial angle; I do have a NOS unmarked blue Zooka, 1 1/8" 105mm x 10°, but NO faceplate. I'd be after £60 for this, but as I say, you'll need to find your own faceplate.
Hope this helps shed some light and provide some useful info.