Any reccs for uk suppliers of the art you put on CPs and cab sides ("Vinyl decals" - that right?)
If you want off the shelf old vinyl stickers then ebay is as good as anywhere. However if you fancy a more bespoke design then there is a way of getting one done -
for free? I got lucky and think anyone should be able to with a little charm and tact...
Contact your nearest University that is running a Graphic Design course, explain to the lecturer (or whatever they call themselves nowadays) that you are building an arcade cabinet and you would like to give someone the opportunity to create the designs for the side art and the marquee. Whoever takes the job on is happy as it's a more interesting task than some of the dross they usually do and it looks good on any portfolio.
Basically that's what I have done, got a lad finishing off his first draft in the next few days but is always really enthusiastic about the project. I have found a place that will print off the design when it is ready, I will keep you informed as to how that's going if you're interested.
I know that it will be a unique design that will fit my cab as I sent him the dimensions at the start, it will fit in with the colour scheme of the cab and won't have characters from games that I don't like. I'm struggling to find a downside here.
If the design isn't suitable then whats the worst that has happened? Not much, just say "no thanks" and try again...