Hi Marc, I recently sent a chrome metal ignition amplifier bracket to a guy who lives in Zeewolde and it was quite heavy. It cost me £5.95p only so I reckon the tiny little temp sensor would only be £2.00 at the most.
If you want I can get you the temp sensor and post it to you. £12.51 seems way to much to me for the postage.
Cheers Richard.