[V8] Sensor Question

[Speakoutprod at aol.com]

After turning off my V8 after driving it for some time (read: engine is at 
operating temperature) , letting it sit for 5-10 minutes and then trying to 
restart, it often just cranks with no starting.  If I were to stop the car and 
immediately try to restart it, no problem.  If I were to stop the car and then 
let it sit for 30 minutes and then try to restart, no problem.

I had the shop check the fuel pressure to see if the check valve in the fuel 
pump may be faulty, but it's OK.  They believe it's the sensor that checks for 
cylinder #1 -- they got some intermittents on the test.  

A new sensor costs $169.00.  Anyone know of a significantly cheaper source, 
or have a parted out V8 that would offer this part for a lower cost?

Thanks,

Brad Hartman
1990 V8