The blue fuel injection coolant temp sender PN is 025 906 041A
O-ring for the fuel injection coolant temp sender PN is N903 168 02
Clip that holds them into the thermostat housing is PN BR549
I have all three of these items for $10 plus shipping they can be yours.
Call me (number below).  I take credit cards.

Thanks,
PS No I really don't know what the part number for that clip is but I gots me
one :)
Ken Wilford
http://www.vanagain.com
John 3:16
Phone: (856)-765-1583
Shop:   (856)-327-0027
Fax:     (856)-327-2242