How can I find the work order for a part that was processed in Zissue already?

For the past few weeks my Squad has been misplacing work orders and/or MROs for parts that we processed in zissue. We know what the NSN is on each part due to the label on each part but we don't know which part was issued to which customer. If there is anyone who can with this problem it would be appreciated. I'm not sure where to start looking on emu+ (maintenance) and myself and the other 92A SGT is here are lost trying to help our soldiers. We work in the motorpool.