$800 for a strut installed is robbery. I have never heard of a "support strut" for Contours. I would shop around some more. Sometimes the smaller Mom and Pop shops will do the work a little cheaper. Good luck.
-Ken V.
1998.5 SE Praire Tan Zetec ATX
psycho_bass@hotmail.com
Roush springs Roush rear sway bar BAT struts 17" Millie Miglia HT3 and a ton of subtle asthetic mods