I have an idea! If they cannot sort copyright of the logo, then route in a space for a decent badge to be added by the customer.
I have seen some on Ebay that are printed from aluminum and actually look ok.
The C64 and C64C will be easy to sort out, as would an A500/+.
The A1200 would be a small problem but I would certainly be ok sticking a badge on one of them, more so if they used the extra space for another LED for pcmcia activity mods