Hello Cooter, welcome to Cloud City. Was is your real name, if you don't mind me asking.
I can set you up with a Imperial Gunner helmet, what is know to us as the IG for $75 a kit. You will have to finish it, and it needs the cag decals and the visor, but that is easy to come by. Please PM or email me. There are two others that are wanting to get this helmet as well, so we can make a mass order and save on shipping.
Also, check out Jason Shaw on this board, he start the Imperial Gunners corps, the premier Imperial Gunner detachment for the 501st.