Sony DPT-RP1 sleeve suggestions

Hi Everyone, I just got my Sony DPT-RP1 today (yay! Amazon Warehouse deal!) ... I am shocked by how fragile this device seems. I am scared to put it in my backpack... Does anyone have a good sleeve suggestion? I just want something sturdy and safe that I can put the DPT-RP1, when it is in my backpack.

Any suggestions would be helpful.
Thanks.