2005 Anakin conversion kit blade size and blade plug

So the 2005 anakin conversion kit just came back into stock and i was able to snag one. I was wondering what is the size of the blade that fits into the converted blade holder? Also, where or how can i make a cool looking blade plug? Ive read about people going to hardware stores and going to the faucet sections and stuff but i cant seem to find a thread about actually making one. From buying the plug the making it fit into the hilt itself. Also, is there a way to change the battery pack of the 2005 MR sabers? If so, how?

Thanks!