Borgeson Power Steering Alternatives

My power steering pump needs replacement, and my Mustang vendor can't supply me with a replacement.
Instead he recommends a Borgeson pump with adapter, or a new "integrated" steering unit with integral power steering (that costs 4 times more).

Anyone have experience that can advice me? Is the integral unit worth the extra?

http://www.mustangmonthly.com/techarticles/mump_1003_how_to_install_integral_power_steering_gear/

Thanks. I ordered Borgeson and it is installed. Works fine. less noisy than stock too.