They do make electric power steering pumps. A lot of hardcore autocross racers have them.
You have a fairly light car, you might be able to eliminate the P/S all together. If you run a tube from the "out" to the "in" on your rack and put a breather on the bypass tube, you can get pretty good steering with a power rack and no pump, this only works well on light cars. On my civic I have something similar done, and its actually barely noticeable. Its only a little tough when you're going really slow, but hardly anything that I would complain about.
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