Replying to Search bar for "the official buyer/ seller list

so when i am buying stuff from NSers i always wonder about thier history of selling and im sure they wonder about my buying.... now the list is HUGE!!!so i dont want to spend a few hours searching for one guy....so i was wondering if it would be possible to make a extra search bar for just that thread and you would type the persons name in and it would show the results with anything with that persons name in it.....now im not sure if this is even possible cuz im not that smart w/ computers, but if it is possible it would be great if someone made one...just a thought im sure everyone would like.