Instructions for new chimney draught excluder

This is what Chimney Sheep Ltd was looking for in their graphic design

I have a product that is a draught excluder for chimneys, made of felted sheep wool. Please have a look at the website www.chimneysheep.co.uk for more details, particularly the How to Use page and the video. You'll see a graphic of the chimney sheep in a flue. I'm looking for two things for this project:
1/ a better graphic of the chimney sheep in the flue.
2/ better instructions than my own hand-drawn ones.
With the image of the "sheep" in the flue, it should curve the other way like an upside down umbrella. Ideally, I'd like something a bit more 3D looking. I've attached a couple of images of cut-away chimneys used by competitors' products - something similar to these would be good. But not too twee! Simple and demonstrative is what I'm looking for.
With the instructions, I'm looking for some better graphic images that convey what the hand drawings do. There are a total of nine different sizes of product so they must be fairly generic. The product used to come wit… Read more