How do you find a certain .dds file?

How do you find a .dds file that you want? like a certain tro armour or anything?
Im really newbie at this stuff..
Appreciate the help! :D

This might help you:

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Also, if you're looking for something here, the linklist will come in handy:

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:o thanks man!!! it helped alot! i already made one edit lol