Help With My Super Bee

[CanCOPO]

Guys:
I need a bit of help. I bought Charlie's SuperBee. It's my first Mopar and I absolutely love it. I need to do a few minor things to the car and want to keep it as original as possible. What is a good source for plug wires, belts, shocks and a brake booster/master cylinder and or place to have it rebuilt. I will probably put a new one on and have the original rebuilt and then reinstall.

And a bit of a puzzle. How do you lock the doors? Key doesn't work and if you push the button down and close the door it pops up. If you try pushing the door handle button in with the lock down it won't move. Is there a Mopar secret or does it simply need servicing?

Thanks and much appreciated.