Where can I buy the OPTEX EXCELLENCE SYSTEM 35MM series

The Optex Periscope has been built using Telecentric optics. This multi-format system can be configured to work on both 2K/4K Digital or Film cameras. Covers full S35 aperture with no vignetting. The OpTex Excellence is available with five super compact dedicated lenses offering 120°, 100°, 78°, 60° and 45° angles of view that, due to the unique design of the system, remain constant regardless of the taking format used. The equivalent focal lengths for 35mm PL module Full Aperture i.e. Alexa are 10mm, 14mm, 20mm, 28mm and 40mm all at T5.6. Same with 90 deg module. With extreme close focus ability almost down to the front element.