Sorry if I'm rambling on about things you already know, but I thought I'd throw in my 2c worth.
The Koni 8641-1071 (front) inserts are 382mm long. If that's too long, you might be able to use the 8641-1072 (rear) inserts. The rear strut tubes are about 25mm shorter, so I assume the 8641-1072 cartridges are as well.
Failing that, are you able to modify the 2" struts from an AE86, or something similar, to make them fit? If so, the Koni 8611 series are another option. They're a bit more expensive, but have separate adjustment for bump and rebound, and come in a number of lengths from about 290mm to 390mm. I've just shortened the front struts in my AW11 about 50mm with these, but haven't tried them out yet. As the AW11 has the narrower front struts, I had to modify a set of SW20s to fit.