The original vac head piece was crafted by Allan Hansen, this is used on all ATST's in the group apart from mine, i went my own way with the profile.
Quincy Cutshaw then used the same pattern i believe and possibly modified it, it was a while ago we did this project so im a tad hazy, dont recall them being offered in the end though, Quincy may tell you more.
Its a donor hungry beast though, think we maybe got to over 40 kits, some blooming rare and spendy too, the C600 Delivery truck being one, prices on them werent appealing to begin with, once it was found as an ATST donor, they soared big time.
It is one hell of a sexy prop though, lots of fun to build, and a joy to look at completed, the ROTJ never really got me hooked, the ESB, well, its got that cult short screen time status for me.
Be nice to see an update Jason, the one you built for Mike was lovely.
lee