M561 Gamma Goat

I herded a Gamma Goat around for a number of years before my unit got the Humvee and have decided that I'm going to make the Tamiya kit my next purchase. Have a couple of problems though. The first isn't really that much of a problem. The kit apparently has a driver with the Kevlar "Fritz" helmet - just going to swap heads (duh). The other is a little less easy to correct. The only time that the canvas covers (covering the drivers position and the cargo area on the aft end) were off the vehicles in my unit was when the vehicle was undergoing major maintenance. As the kit seems to lack any representation of the canvas parts and the support steel parts, I would like to know if anyone is producing (or planning produce) these parts. Or am I going to have scratch build those items.