solenoid

I went to an auto parts store for help with an engine light being on. They identified the part.....Vapor Canister Purge Solenoid. I asked if this was something I could do myself. They said yes, definitely. The part had to be ordered, when I picked it up, I asked if they could show me where...

So it was about 100 degrees, air running and Jeep over heated, the dealership wants to charge us $3700 to "fix" IF.... they can find the part (solenoid for fan?) Told us to call around to find an after market one. Anyone have any experience with this, does this sound reasonable?