I've seen quite a good range of screen protectors and cases for the iPod Touch 5G on LoveCases.co.uk. I've used CaseMate and Cygnett before so I know they're both good brands although I'm unsure about FlexiShield.
http://www.lovecases.co.uk/ipod/ipod-touch-cases-covers/5g.html
http://www.lovecases.co.uk/ipod/ipod-touch-cases-covers/5g.html