Paint and Fabric Protection - Getting else where ?

[DensionThis]

Buying a car and you get offered something like this: http://www.motorpoint.co.uk/extras/paintprotection

On the face it, great thing to have but expensive..

Wondered if guys on here get this sort of thing done independently and if so then where? Have a small kid and fabric seats and kids don't go too well so need something to protect those too.

Cheers
p.s. I am based around Milton Keynes