I am in a wheelchair and I needed something to put my phone in that I could hook to my seatbelt. I used to have the Mythic and I found a nice case for it that I can just slip it into, but of course this phone was too big for that case. I thought I was going to have a horrible time finding something to use with this phone, but to my surprise I found a little camera case with the neoprene (sp) material and it has the wrist strap that I can feed my seatbelt thru. I am about to buy a hard cover for my phone and I am praying it doesn't add too much bulk to the phone so it doesn't fit in my case anymore!
There are nice/cheap hard covers on ebay that aren't too big...may have some luck there.
Complete side note -- what kind of chair do you have? Hubs is in a Sunrise Quickie GP.