Next best bet, would be if you have a LE buddy. That's what I usually use.
this.
but if you call your local pd/so with a few serial numbers that you picked up at a gun show or whatever, theyll usually run it for ya if they arent busy.
it helps if you bring pizza.
I like the pizza idea. Would donuts work too or would that be too cliche?
this time of year i'd suggest king cake