Why not just just the grammatically correct terms "Hey, why don't you SEARCH for it?"
If I used your suggestion (which is an excellent suggestion, by the way), he would probably respond by asking, "Where?" And then I would be forced to elaborate on the intransitive verb of "search" with a specific name of a search engine, such as Google, Yahoo, or All the Web, which may lead me into a conversation I didn't have time for at that particular moment. And knowing my luck, by the time I briefly explained the advantages and disadvantages of various and sundry search engines to the first person, someone else in the room would invariably walk up and ask, "Search fer whut?"
At this point, I would either have to say, "Mind your own da*n business" and walk off, or I would have to answer the second person's question by replacing the object of the preposition in the original answer -- the word "it" -- by repeating myself all over again.
Which, as you've likely concluded by now, would lead me right back to my dilemma at the beginning of my conversation with the first person -- how to answer sufficiently a valid question without wasting time by using unnecessary verbiage.
All this could be avoided by answering in the first place: "Why don'cha Google it?"