Just brought an Ipod Plastic sleeve kit yesturday, as i have a nano, and needed the sleeve to stop it slopping around.
Cost me £9.00, for a range of sleeves for all ipods which i dont own
Unfortunatly, the centre armrest ipod kit wasnt designed for the iphone nor ipod touch, when you remove the sleeve, it will fit but its not really ment too.
Part number for the kit is...
1K0868003B9B9
hth