I have my brand spanking new red (!!) T1 nestled in the Oberon cover I got for the red 505 I traded in; top to bottom the fit is good but the T1 is a smidge narrower. The corner straps at the top fit fine, not as good at the bottom though so I'm gonna try and come up with some sort of strap or something to span between the bottom corner straps just about the level where it says Sony.
After I do that I'd like to try and come up with a way to adapt my beautiful old red Dooney & Bourke 505 cover I got years ago. I don't really want to use Velcro dots or similar; I don't suppose Sony sells the attachments used in the T1 cases. If I can't I'll just use it for my old blue 505 I repossessed from my Dad; I "gave" it to him when I got a good deal on the red one I just traded in. He never uses it and I can use it for the myriad old LRF's I haven't gotten around to converting to ePub.
Can't believe I now have three e-readers!