Piss easy. Just buy old stand up comedy records (Steven Wright, Flip Wilson etc.) you'll get a mixture of fake and real laughter on those...and it will sound corny.
all he has to do without paying money is look at an old show like Threes Company tape it, put it on DVD then put it in your computer and upload it and chop it that's how I do it. I have a DVD to Tape and Tape to DVD caught that for 99 bucks. now I can sample anything off tv.