[Donutt]

Agreed. I have always carried front end spares for all the cars I've raced.

Another tip, consider carrying a few of the screws/bolts, etc that hold everything together. Putting the right screw back in is better than cobbling the wrong one.

Get a good pre-race check routine together, spend the time after marshalling to check for loose screws. They lead to as many breakages as impacts.

Also including checking/rebuilding the car after a meeting. You'll be surprised what isn't obvious when you just "look over" the car. I've taken cars apart before to find hairline cracks on wishbone edges that at best make the car handle badly or worse, break under strangely light impacts. I didn't see the crack until I took it all apart and put it back together.

That way, you've got a chance to order and replace before a race meeting.
It sounds like a lot of work, but it also helps keep the car tight and predictable.

I expect some of that is obvious, but hope it helps.