best of luck finding your desired spray paint, honestly if you plan to do a lot of custom colours or a lot of suits - you might invest in a Air Brush system, some fairly cheap ones there, and you just mix and thin paints (liquid kinds) to use as air brush paint, and this gives you the option for some much better detail, and custom colours of any spectrum, you can even (bare with me here) you can even buy the special UV liquid sealer that has no colour to it, except when hit by Ultra Violet rays (like direct sunlight, or a blacklight, and black light LEDs) and make it glow.
This actually is what intrigued me most for looking into air brush systems. It would be a simple way, on the inside of parts, to stencil-paint a Logo that no one could see that would ID it as "yours" (I had theft issues in the past, so I am totally going all out on anti-theft and proving parts are mine) although basic and easily overcome (another paint job, etc) it was one of my basic ideas for anti-theft. Simple to do, and hardly detectable unless you "knew what you were looking for" I have since scrapped this idea (too easily foiled) and gone with something more... intense... Mildly-Radioactive "Finger prints" - no just kidding! although that would work.... it would be expensive to detect in detail - my real idea is to implant my logo (or name) made of thin tin into the gear, so it can be easily seen with a X Ray. Although some consider this "extreme measures" - I look at it as the ultimate insurance, why spend thousands of dollars making the coolest suit, then have it stolen and feel hopeless? Another -easier- idea is to buy a simple GPS unit found on ebay, and rig it into the wiring for the lights/etc. The power draw would be minimal and they have button-cell battery thin GPS units. (then all you need is the detector to find where YOUR piece is.)
Anyway back to paints - your best bet for Sprays is online. Walmart and craft stores have a lot to choose from, but hardly keep stock of everything. As stated if your going to do this a lot or want crazy patterns/detail - a airbrush would be more cost effective (and time effective) in the long run.
Craft stores:
Wal-Mart (also check Auto places, autozone, o'reilly's, jiffy lube, etc, if they don't "have it" ask them if they know where)
K-mart (if they are still around in your area)
Joannes (fabric shop- but you'd be surprised how much extra they have, including paints)
Hancock fabrics (ditto with Joannes)
Hobby Lobby (be prepared for some serious $$ inflation)
Model Shops - people who paint miniatures/figurines (Dungeons and Dragons, Warhammer, etc) usually know of good paint sources.
If all these (and names of stores I didn't mention but you found driving around looking) fail you - then Online may be your best bet.
Ebay "may" have some as well - check reputation before buying and be weary of "damaged" or "used" cans. They may not be usable at all to you - or simply too little inside to suit your needs.
