2001 Kia Rio Power Steering Pump Valve?

[kb]

We have this 2001 Kia Rio and we are getting ready to sell it. We had to change the power steering pump which we got from the dealer, but there is a problem, there is this valve on top, at least I think that's what it is and it is leaking. The pump didn't come with a new one and when I called the dealer they said they don't carry them...Does anyone know what exactly this part is and maybe where I could find one besides having to search through a junk yard?
Thanks so much!

Basically everything for stupid Kia's are dealer only. The part was shown to them when they delivered it to my boyfriend's store and the guy said they don't have it but some small parts store might. I haven't found a place yet that has it.

[DONW]

If you don't know "Exactly" what this part is then how do know the dealer does not have it?

It is the power steering variable assist solenoid. Dealer only...