I doubt anything else will be done (at least screen printed). You need to have a license agreement to sell this and based on my CPO sales, there is no way I would be up for printing anything else for the machine.
I printed the CPOs mostly because I really like the game, not so much to make money on (trust me I still haven't broken even yet).
The original marquees usually do hold up pretty well and I have seen NOS lower CPOs once a while for sale (I have one, but it is not for sale).
Anthony