I work a lot with rally (WRC Style) and Off-Road Racing Cars and Teams.

Important parts overlooked by many (and yes, me too on my own VX) are:
- Brake Pads
- Brake Rotors
- Front Hub
- Front Wheel Bearing/Seal Kit (at least one!)
- Brake Hoses (luckily I manufacture these for a living :-)
- Uprights ("Knuckles") left and right
OR preferably complete (preset) assemblies for left and right "corners" - makes changeovers a breeze.

Although I keep the caining to "occasional" I keep the following as spares in my own workshop:
- Trailing Arms (make these myself from Chromoly)
- Adjustable Top Link
- Adjustable Panard Rod/ Lateral Link
- Left and Right Front Corner Assemblies complete with Brake Hoses and HalfShafts
- EXTRA Set of CV Joint (outer) (1 only)
- Top Ball Joint (1)
- Lower Ball Joint (1)
- Wheel Bearing Kit (1)

Still needed (on my to-get-list):
- Lower Control A-Arms (L&R)
- Upper Control Arms (L&R)
- Beefy Adjustable Sway Bar (may have to make this sucker)
- a pair of nice adjustable Bilstein Shocks!
OMG where does it end???? $$$$$
Perhaps purchasing a spare BigHorn or Trooper to Pirate the parts of.....