Mr skidog,
We have a GMG dealer in Batesville, Indiana that makes some very nice modifications for these cookers. You can find the dealer on Facebook under this name: Wiedemans Green Mountain Grills
This dealer is also a Heating, Electric, Cooling dealer and has an employee by the name of Dave Lattire that welds up all the neat accessories for the Green Mountain Grills. The Facebook page has all the information with prices and how to order the items.