I bought an el cheapo knockoff Apexi twin funnel air filter online, and rather than just having a rubber fitting that pops over a pipe like very other pod style filter, it had a bolt-on flange type dealie. So I tried my hand at designing a custom adapter to fit the filter to my air flow meter.
In the end I fabricated one out of steel instead, if it were a little cheaper to ship I would have ordered a printed one just out of curiousity. If it works for someone else, hoorah!