I would tell you that suspension parts including shock towers are best sourced from RPM RC Products. They used to have a lifetime warranty against breakage; not sure if they still do. I’ve only broken one RPM A-Arm in nearly 30 years of R/C.

For transmission, Diff, and driveline bulletproofing, HOT Racing and MIP RC Products have been my go-to for many years as well. I would avoid the knock-off crap on Amazon. A lot of it is just knock-off counterfeits. I don’t know if MIP is still around, but NOS items are still available if you are willing to be patient and do some research. Also, unless you thrash your model really hard, it shouldn’t break very easily; especially with a TRX 2.5 for power. Simple upgrades like replacing bushings with bearings, replacing stock servos with metal gear servos, better tuned exhausts, and keeping the truck clean will make it last longer and perform better.