PLEASE HELP!!! Extended battery case

[Aydie]

I have the ebay 3500 mah battery and first let me say its awesome. for all those who say it blows up in a week ive been using it for nine months and nothing but awesome so far but i need some help from anyone. I removed the back door for the extended battery and simply but a tpu case over the bare back of the phone and it actually worked really well in protecting the phone and acting as a back door for the battery but i want to know if there is another case out there that could stretch and hold better than the one i have. if anyone has the battery could they please just try this experiment by taking the door off and putting a case over and maybe taking a picture i dont want to buy twenty cases to try this and u might find this to actually work so leave comments or pics PLEASE.