These are getting hard to find used especially reservoirs, brackets etc. 

There were new kits available through Force America (Char Lynn style)

A friend of mine works on older IH stuff and he had a hard time getting a new set up for a customer earlier this year. Guy ended up spending what the tractor was probably worth for the system and getting it installed but he really wanted power steering.

My friend said he was told Force America was phasing all this stuff out ?

I was concerned as I have a Char Lynn set up on a Super 77 and wanted to know about future parts availability.

Maybe others have more info on the Force America phaseout ?

Force America page 6 mentions the PS units.

http://www.forceamerica.com/Portals/forceamerica/documents/productbrochures/markets/Agriculture/Agriculture%20Parts%20and%20Equipment.pdf

Yesterday's Tractors thread on ad on power steering.

http://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=farmall&th=847704

Many years ago at a scrap yard there was a pile of these laying there and I thought I had hit a real gold mine.  Picked up about 5 or 6 of these figuring they would be worth a lot some day. Got up to the scale to weigh out and was informed these could not leave the yard. Stipulation came from the forklift company that had scrapped out a bunch of stuff that these components could not be sold whole or leave the yard intact.

My Gold mine was removed from the truck and I left empty handed.  :-(