Cracked coolant reservoir
I have a cracked coolant reservoir in my 2005 M6. I discovered it when I replaced my water pump this winter and tried to refill my coolant. Problem is, a new reservoir from a GM parts dealer is like $150. That's just for the plastic box- no one I've contacted has the cap for it (the one with a dipstick), and mine's broken inside my reservoir.
I've been driving around with it like that for a while, and probably lose about a quart/week. I'm ready to replace this damn thing, but I don't know what brand/product to go with. The best I could find are universal fit tanks, but I don't know how universal they are.
Can anyone point me in the right direction to buy a reservoir?