We've been searcing for about 5 years for a new frame to replace the old 2001 Flip Up and we've finally one that meets our requirements. http://www.auralens.net/e_gw_flipup.cfm
The frame is available in two configurations, one with a clear base lens and the filter material in the flip up, and the other with AUR-92 in the base lens, and a variety of boro filters for the flip up. Prices are in line with our other products, as we've worked out a long-term deal on the frame with our supplier.
Have a great day!!