There isn't anything commercial yet but someone in the last discussion on this (HandyHoward maybe?) mentioned that he used a couple of thick leather flaps to block/divert some of the heat.
If you haven't already done so you can also disconnect your O2 sensors which will make it run a little cooler.
Retired USAF, IYAAYAS!
2008 V-Star 1100 Custom Bobber project
2011 Crimson XR with Forged Highway Bars / Hard Bags / Passenger Backrest, Ness parts including Smooth Layback Plate Frame/Mount / Rad 3 Mirror / deep cut grips / drivers floorboards /shifter peg / brake peg / passenger pegs. Witchdoctor black rack, Lloydz filter / timing wheel / VFC III, 7Jurock windshield, Drag Specialties seat.