Hey guys-
Well I ordred the Behr (was actually cheaper)- and the O-rings. And I too opened the heater core box and found o-rings and the foam pad strip in there. (Sigh.) It appears to be of decent quality which was a relief.

The recirculate function hasn't worked since I got the car- so that really needs attention too. The problem is, since its a Euro model (I don't have pushbutton controls- I have knobs for temp and slide switches for fan speed, etc.) I don't know what I'll need to get the recirculation function operating again. I have 2 manuals (including a Chilton's from the UK) but nothing that gives diagrams of the heater box, recirc pod, etc.