Maybe you could epoxy an extender to the adjuster, and feed that up between the seat and the rear firewall. Then put a little knob on the top. I'm picturing a wing adjustment handle-type thingy here. I can't remember if the strut tops are offset too far for this to work, though. A flex adapter would probably make it workable, now that I think about it.
If you were super-duper clever, you'd find a way to put a stepper motor or something on the strut top, and have it adjustable from the driver's seat. Voila, el-cheapo Tein EDFC!
I was thinking about putting in something like a dzus fastener for the seat bolts, actually. Not removing the seat at all would obviously be the best way by far, but this wouldn't require any real fabrication.