There kinda used to be an independent site that utilized the ACEs set and let you play with that. The problem is it didnt work very well, and was very limited in what you could actually do with it.
Having tried to design some from the ground up myself, what I recommend (unless you have lots of adobe experience), sketch up an idea of what you want and go to one of the experienced designers and have them help you out. Designing the chip faces isnt all that hard, but doing the edge parts and matching up any edge spots is a special kind of difficult.
You can certainly use the CPC and Paulson design tool to get an idea of what you want. As well as using inkscape to get a better idea of how it will all go together without too much investment.