Just an update - I emailed DecalGirl again regarding skins for the T1, and got this response:
"I am sorry but I do not have any kind of timeline that I would be able to give to you. What I can do though is have it added to our list of devices to discuss with our development team. If the device is really being marketed or we get a great response from consumers there may be a great chance we will do it. We release about 4-5 devices per month so are always looking for devices to bring in. We use Facebook to announce all our new device designs, so please follow us!"
So, if you'd like skins from DecalGirl for your T1, you really have to let them know!
Their email is:
support@decalgirl.com