I put mine in my medge case that I had for my Sony 505 (I think it's the same one they sell for the PRS-600). It fits ok - it is a bit shorter than the Sony so the top straps just barly loop over the top corrners, but it does hold it pretty secure. I have the executive jacket, but they have different cover that would hold it in theposition you wanted.
HTH. I'm happy with this setup for mine (for now) but when they release the cases that are specifically for the Kobo Touch - I'll be buying another cover from them.