This stuff
here?
http://www.mortalkombatwarehouse.com/ is a good place to look for individual items like that for all the MK games aside from MK:Shaolin Monks and MK: Special Forces. You also will not find the MK movies
(Armageddon and Annihilation), the t.v. show
(Conquest), or the cartoon
(Defenders of the Realms) there. Sprites, screenshots...ect is what they'll have there.
They are a sister site to this one that really just focuses on the games. Also look throughout the "Network" drop-down menu at the top of any page on this site. That'll be the bulk of it, anything else specific like this, and you're gonna have to try to find it through google.
Don't be afraid to ask though, many of us here know where to get alot of MK stuff.