Last time I looked there wasn't much space around the power steer pump & plumbing would be a nightmare.
It would be possible to put a small modern alternator in place of the power steer pump and then locate the supercharger where the alternator is normally located.
I think an SC12 from a 4A-GZE has been tried, although I may be getting confused. I don't know what the availability of these is like where you're from but you might find an SC14 from a 1G-GZE is the same price. The SC12 has a capacity of about 1200cc, the SC14 has a capacity of about 1400cc. The SC14 is basically the same as the SC12 except a bit longer.
Many car manufacturers have been switching from Hydraulic Power steering (like the K11) to electric power steering in recent years.
They all make claims of the electric systems being more efficient. Numbers like 3-4-5 percent improvement in fuel efficiency are not unusual.
Ford quotes 8 percent for the Ford Escape and Mercury Mariner small sport utility vehicles.
I would have expected at least 2% for the K11.
I've had the intention of removing my power steering, the only thing stopping me has been thoughts of selling the car & buying another with a body in better condition. Anyway, I had intended leaving the power steer rack, draining of all fluid & removing pump & lines & connecting the hydraulic connections to the rack together (with 99% air being pushed back & forth) & plugging the ports on the column. I've got the idler pulley from the non power steer version.
When I was at university I was driving 50,000km per year. If it was doing that today it'd be about $5000 in petrol. 2% of $5000 is $100 per year.