Anything is possible but there is no conversion from the factory that I know of. Keep searching under B7100 and power steering to see some of the other threads concerning this.
I had a B7200 HST... I tried for two years to find eithier a new or used power steering unit. The steering got to be to much with the FEL. There is nothing out there, so I sold my 7200 and got a B7510.
well it can be done just finding parts and be handy with a torch and welder look below also search on ebay for parts search for DANFOSS STEERING
and John Deere 318 Power Steering
then all u need is hoses and mount for unit as u see i welded one up