Hi guys, postal asked me to answer you cause he's pretty busy at work and all...

The material used in the ICE installation is some flexible wannabe leather, pretty easy to come by, just go in to any DIY cloth shop, they'll have it...

More pictures can be found on http://www.escort-cosworth.dk/ under the "galleri" section, from there you can click the cossie and se some more different pictures, also the back and side is shown there...
Which brings me to answer the last question, Postal took the spoiler off himself, and in the mentioned gallery you can see the process

Just to keep you guys updated