Yes mate, DMS racing and Trackside Spares stock all the bits you'll need. All I have broken is the front shock tower which I replaced with a Thumb Designs Carbon one. Plenty of aftermarket custom upgrades to aid tuning and weight/strength. Plus they are cheap!
When I put the hard springs on the front it made a huge difference. Kept soft on the back though as with the hard on the the back it tended to skip out.
Kyosho are a popular track car. Don't really see hypers on the track. My advice, get the Kyosho. As a RTR they are capable, then you can pick up the upgrades as and when.
Setup is key with the little ones. With the rally blocks you get so much grip you want the car as planted as possible but to clear the 1/10 obstacles you need ride height which in turn gives you roll!. Anti roll bars and a little toe in work for me and I can leather it into most corners!
Be good if you got one Neil. 4 or 5 regulars may secure us a heat!