If you go the Moon Patrol Sideart, you go Moon Patrol theme for the lot. Mixing and matching will just make creating a theme harder or more fiddly.
In my mind (relating to mame based cabs), an asthetic external replica/copy of a lovely themed dedicated cab(like Moon Patrol), with mame internals, is the ducks nuts. You still get that look of.. "Wow, you've got a 'Moon Patrol'"....and then they realise it plays a 100 other classics as well!
A modified vector trace of the original CPO with a few extra buttons added in to suit can look great. Some of the original CPO designs can take extras buttons etc without modifying and still look good...... in my eyes anyway.