We had a batch of these filters made. We met a guy at the PRI show that was able to make custom air filters and his price was reasonable enough that we decided to move forward with making some. I'm expecting them to start arriving soon (maybe even this week). We're building out a website to try and make these transactions easier, it's going to take a minute to set up but I'll put out a thread on here and on the FE Facebook page when we've got that live.
In addition to the R-code correct air filters, we also had them make a taller 3" version. A lesser quantity of those were made.