Quoted from radium:
Custom for pinball? What is custom? Just a voltage change and removing the battery?
Ive made a couple from Ebay in the thoughts of selling them.
Small time conversion, or larger volume purchase for it fabricated as Plug and play, didnt fit for me as a business.
I would gladly pay the extra $10, if someone like the OP is offering to do all this work for me.
Offering a very fair price to have it ready to go.....