Here is want Rich - AnalogVX told me about those skid plates:

From experience, the only skid plate you will absolutely need is...
#8-97049-784-0 trans protector $60.00
#8-97104-788-0 bolts $0.56ea
get 4 bolts.
It replaces that flimsy tin crap that's bolted to the crossmember now.


If you really really really want the other skid plates they are...
8-97018-375-2 Heat Protector $87.71
8-97036-238-1 Frame Protector $ $39.08

I think these 2 are a waste of money. The heat protector is the skid plate from the older Trooper which protects some exhaust piping that we do not have. This is also the one that hangs excessively low, I took it off.

Hope that helps.
yal