rufaster.com should have the parts you need.
I have an Avalanche XP and these are the things that Ihave done/can recomend.
Rear shock tower is weak. Redcat sells an upgrade for like $22, or... I bought 2 regular rear shock towers on clearance for $1.50 each, bonded them together with glue and replaced the original screws with 2mm longer screws. rear shock tower is pretty strong now. I think the Hurricane has a different tower but the premice should still work.
Rear chassis brace mount is kind of weak. Replace plastic with this. It may just save you from replacing the whole chassis down the road.
Check front and rear diffs. They may need lube.
If your rear upper arm fixing block is plastic you may want to consider this part. The stock plastic ones can flex on a hard landing and allow the rear susspension to pop loose.
Other things I have done is to change the muffler and aif filter.
This is my Avalanche. The pipe has now been remounted so that the exhaust points down.
That's all I can think of for now.