Sorry,
but what you really need is the whole custom code and a "how I made it" guide. As you can probably understand, this kind of support is out o scope for this forum, and I could not provide assistance like this for any user with customization needs.

Moreover, we offer a customization service if you need it:
www.selfget.com/services/technical-support/jbackend-custom-modules.html

Kind regards,
Luigi