This might be an off reply, but here it goes. When I was building my Republic Commando, I ended up finding them at a smoke shop. I'm not one to "partake" but I went to Home Depot first and asked for screens for a faucet. The Rep gave me a dirty look and said they were now built into faucets to keep people from taking them out for their pipes. Given his response I decided to look where those "pipes" are sold. And low and behold they're sold in packs of 5. I hope this helps.