No Longer have device or access to device-iTunes association

We have moved on from some of our old iPads and iPods, they are still associated with my iTunes account. I need to remove them to make room for the new ones.
I no longer have the old devices, and therefor cannot access them in any way.

I have removed my old computers through the iTunes menu, but that does not remove the IOS devices.

Any idea how I can remove these devices?

THX JU

via ehMac.ca http://ift.tt/2akTgbW