Erickson actually supports modelers, they have photos and drawings to help people make more accurate models of their helicopters.
http://www.ericksonaircrane.com/Content.asp?usePage=/ModelerZone07.asp
I also have some walk around photos of Erickson and Siller Bros skycranes if you need more than what you find on Erickson's site.
I have not seen that issue of FSM but have seen a couple of Skycranes built up. There are about 5 companies flying the Skycrane but Erickson is the largest operator and I believe the only one who flies them in other countries. They send a few down your way every year for your fire season.