I'm looking for the part number for this gasket and I'm hoping that the Ford experts amongst the collective can help. It from a 2001 Ford Focus 1.6 Zetec SE/ Sigma (although I believe it is the same for the 1.25, 1.4, 1.6 & 1.7 variants) and it is for the temperature sender housing at the gearbox end of the engine, just under the coil pack. I've seen this as part of the head gasket kits that are available, but I've not found this part on its own.
Can anyone help me find out where I can get one please?
Thank you!

sigma-gasket