We have an app that has an HTML5 version. It does not show up nicely on a Blackberry - and we don't have access to the raw HTML5 code only the website in a browser. Not sure if it can be "Saved As" and then that code edited and converted for BB. Not sure if the source code can be used but we have the Android file for the app as well if you can reverse engineer it and then convert it to BB - if that's even possible.
We own the app! You may need to create some button images.
We need the camera and a few of the native features like mail added to the BB version as well.