I don't have any of the 4x4 line Arrmas. All 6s stuff here.
Maybe if you mention specifically what you need, others may offer some parts, IDK.
Sometimes, others would only ask you pay the shipping. Fair enough.

You have both a Vorteks and a BRCC???
This hobby reqires some coin in your pocket no doubt. Maybe a part time gig can get you going?
How I started 35+ years ago when I was young. My parents couldn't afford to support this expensive hobby. Driving them more carefully is a start?? Driving these 4x4 Arrmas like all the YT influencers do will always $cost$.
Just some food for thought.
FWIW this is a good clean hobby that will take you through your adult years. Don't give up. This hobby kept me off the streets, taught me much and and kept me out of trouble. My parents were all for that.

So I did have some support in this regard. Just that it gets exensive, you need to pay to play.
Good luck.