Dennis,
I came across these to Air Cleaner Thermal Sensor Units the first one is $22 and $75 on ebay.
Stephan
GM part number is 6484242 at
http://www.buickfarm.net/index.phpoption=com_redshop&view=product&pid=68...
http://www.ebay.co.uk/itm/Jaguar-S3-V12-E-Type-Air-Cleaner-Sensor-Unit-/...
NDP,CLASSIC RESTORATION PARTS.