Searching for exclusive items in psn store?

[TechMemphis]

Anyone know if there is a way on pc or psn store to search for exclusive dlc items or content stuff like you would only get vouchers for at events say such as an AMC theather event, Comicon, PAX East, or E3? Im specifically looking some uncharted 3 shirts and guns given away at these and other events. I've never really thought about this before I've looked through some sites that have several pkg's but haven't really came up with much. Any info on this would be appreciated.

[TechMemphis]

This is difficult I've been trying to make progress on it but to no avail. Its hard to search without specific the name of file.pkg. If anyone knows how to find something like this could please quote or pm me. Or if you have any of the special items difficult to get for this game pm me maybe we can work something out.