Not online but I found a 2" pvc inlet strainer at Menards for less than $2 last weekend in the plumbing dept. It's white so I'm just going to paint it blue to match my background.
Check your local plumbing suppliers, you may save a couple of bucks.
Couldn't you make your own? A piece of pvc, cap and some slits from a table saw would work. Granted, it's not the prettiest solution, but if you're in a pinch I'm guessing it would work.