It's funny you should post this...although I'm assuming it is in response to the thread in the vendors section. I actually got this idea some time ago and then stumbled across this while I was searching for VE pump info. I don't plan to charge anything close to what they do though.
We're looking to make it out of tool steel. It ought to be plenty hard and very wear resistant.
One thing to keep in mind though is there are in fact different diameters of LDA pins. I'm not too sure how big the dodge one is.