You can buy the Thermometrics sensor from Mouser Electronics, www.mouser.com
under the new p/n RL1003-1746-97-D1 for $2.27 each or $2.06 in qty of 10
Since this is an ongoing need for the community, how about FastLane or someone stocking these?
'85 300 SD, 165K-Sold
'88 300 TE, 165K-Sold
'64 Porsche 356C Cabriolet
'86 560SL 124K Miles
'94 320E Wagon, 74K Miles