no i just tried making one myself from some of the DIY forums and they ended up costing more and were less than half the quality. when i found foothill it kinda pissed me off that i wasted all the time and money on a filter that didn't work for shit. paid like $60 for their small filter and i haven't had a problem with smell. just wanted to let others know that those filters are the shit for what you pay for them.