G'day Jase and welcome.
There is also RCM (as distinct from RMC) in Melbourne which the basic kit is $7200. For this you get chassis and shell with door inner and outer skins and door frames and boot and bonnet. Nothing swings. Footboxes are also separate and need to be glassed in (this helps when setting up the driver position especially if you're tall, cobras aint roomy). It's hands on but not very difficult with some welding of backets etc and glassing required.
It's the cheapest kit in Oz but it needs a little fabrication here and there but the end result is definately worth it!
It uses narrowed JAG front & rear ends - old school but parts are now cheap. The narrowed Jag ends can be done by RCM.
I cannot fault the manufacturer's customer support either.
I don't have a trade background and I have found the build so far to not be difficult, but I have learnt alot very quickly.
Hope this helps
Cheers
Al