They are standard towers - the standard ones came in at least three different colours - black, gold and a kind of wierd blueyblack anodised finish. I think there may have been silver as well, for a very short while. To be honest, don't worry too much about the shocks - spend money on what breaks when you break it. Get the tank guard/inline filter mount would be an idea. My hyper builds are all brushless, so I've got a later tank here (door opens sideways, a bit more convenient), tank guard, inline filter, some fuel line, and I think some standard chassis braces, in either polished or anodised black finish. Don't have any second hand cnc knuckles spare - the two sets I have are going on cars. Are there bolt points still in place on the chassis for the shock braces? If so, I can do you a cheap deal on some bits.
The reason for using CNC knuckles where possible is that they're a LOT stronger. I've got a spare pair of standard ones here I could let go cheap as well - if you've got the bucks to get cnc straight away it's prob a better idea though. Another popular upgrade is to universal joint type driveshafts rather than dogbones.