Drop Italeri an email and ask for one, they sent me an instructions sheet for a kit when I emailed them asking about spare parts. Do bear in mind they're Italian though, I found there was a little bit of a language barrier when I dealt with them recently, my fault really for not learning Italian.
Their email address is Info@italeri.com
Also you could try looking at these links, it's to pages from a website called model-making.eu that sells Italeri kits and they have photos of the instructions leaflets, sprues and decals.
Can't find the Super Stallion but they do have the basic Super Jolly Green, Pavelow and the Sea Dragon. I'm guessing the closest would be the Super Jolly or Pavelow, becuase the Sea Dragon has those awful large sponsons which make it look like a fat whale!
www.model-making.eu/.../Jolly-gree-Giant.html
www.model-making.eu/.../MH-53E-Sea-Dragon.html
www.model-making.eu/.../Sikorsky-MH-53J-Stallion-Pave-Low-III.html
Hope that's of some help.