Can't help with the a/c lines. However, I just ordered the MECS pump.
Part # 5M6Z-8C419-A

I ordered mine from here:
http://www.sunroadfordparts.com/part...&siteid=213876

Just ordered it today. It was the best price I could find for it. We'll see how long it takes to get it, etc. Sure hope it fixes my problem with "engine temperature too high" and "stop safely now".