FP, PRV- Ive got one mario built that im not using at the momment, if i can find it you can have it pretty cheap.

Ive also got an 11bar one. Also cheap.

Josh i would suggest the very basic of setups for your first system.

Ive got your ram - custom freebie
main bottle - if i can find it u can have it cheap.
regulator - paint ball regulators or welding regulators can be got cheap.
valve - buy a 3/2 valve (on, off, vent) from ebay.

fittings and pipe i always buy from technobots.

when and if you come to birmingham so james can weld up your chassis ill help plumb up your feather. Im helping a mate plumb up a very complex lp pneumatic setup for a double acting high flow hammer, so ill find out were he got his regulator from and let you know