I recently bought a 32x16 LED matrix panel from Cat Clutch for use in an LED robot that will be walking the Las Vegas Strip. They can be found at www.creativeartsandtechnology.com as well as Creative Arts and Technology on Facebook and @thecatclutch on Instagram.
I love this product as it comes pre-loaded with numerous gif animations and you can write your own scrolling messages straight from your IPhone or Android.
I created custom content for it advertising one of the attractions on the strip and to support Las Vegas new hockey team the Golden Knights. It did an excellent job at both, and I can't wait to try more advertising content.
Al helped me out with this product which is normally used in their Cat Clutch handbag, and walked me through programming gif content. They also have a do-it-yourself kit that has the components, without the LEDs, that you can hook up to numerous LEDs for custom matrix sizes (i.e. 32x32, 64x32, 64x64) that I am looking to use in the near future.
If you are in the market for some very unique advertising opportunity, you should definitely contact them and check out their sites.