There are lots of ways to fold etch and if it's just for a few kits it might not be worth the price.
But if you're an etch maniac, or likely to become one, I cannot recommend the etch mate highly enough!
Literally it turns folding etch into a tv-tray while watching the tube laptop exercise.
I really like mine for folding boxes and Panther fenders.
I am 100% satisfied with mine. I got the 6 in model and the longer folding blades and have made good use of the whole length and long blade. I have only had one time I needed a deeper (front to back) field to work with, and with a little ingenuity (turned the part sideways) I still got it folded.
My US$0.02 before taxes
Mike