Poly-Planar Gimbal Mount for MRD80 and 80i Poly-Planar Gimbal Mount for MRD80 and 80i Mounting Bracket for Poly-Planar MRD80/MRD80i Marine Stereo. SKUPPXGMMRD80 MAN#GM-MRD80 ID#: 2810 Our Price: $19.95 Availability: In Stock Condition: Brand New Add to cart We’re sorry for the inconvenience, but please know we are working hard to replenish stock and fill backorders. Global shipping constraints and other material shortages have slowed the supply of products in many industries, including GPS and Marine electronics. We update the Estimated Shipping Date on our website in real time, so feel free to check back frequently. Thank You for your patience and for shopping with The GPS Store, Inc.