I've spent some time working on the artwork again, and am finally happy with it despite all of my earlier revisions. I've opted to cut the top off of my design and keep the side art close to the original shape. Mainly for authenticity, but also because the paint job went well and it would be a shame to cover the whole side in vinyl when it's looking so good.
I'm going to print the control panel myself and wedge it between 2 sheets of lexan. If it looks terrible I'll see what other options I can find.
The artwork above the coin door has been modified to read "1p start, 1p credit, 2p credit, 2p start)" with each arrow pointing to the relevent button on the cabinet.
Waiting now for quotes to come back.