I just got 3 custom made dust filters from Demciflex. These custom dust filters were reasonable priced and folks at Demciflex were accomodating to work with. They can pretty much create a custom filter in any configuration imaginable. They made these filters for me based on my own CAD drawings. Nonetheless, I am very pleased with the end products. Contact Demciflex if you need anything.





http://www.demcifilter.com/