cosplay cosplay advice: Ed Edd n Eddy space outlaws

[Sarge Sixteenbit 287]

So, my friends and I started going to Trotcon dressed as Ed Edd n Eddy. Since they're doing a sci-fi theme this year, we wanted to go as the space outlaw variant of the characters as featured in Dawn of the Eds. I figured that I can make most of the props with cardboard paper mache, and spackling (my budget's not too high, but I did make a kick-ass Gutsman helmet once) and foam. However, the parts that I have questions about are Eddy's bowl helmet and Ed's blender cup helmet. Are there any cost-effective clear materials tomake these with or should I just make opaque ones?