That ebay link is not for a FIT style case.
As for the rip off comment. JB started Instroke. And they work together. How can you rip yourself off.
JB has not been a part of Instroke in any way, shape, or form since he sold the company years ago, and before it moved to China for manufacture, from Germany. JB only did case repairs for some years before he started JB Cases, as part of a non-compete agreement.
So, no....JB does NOT work with Instroke, and he does not share his designs with them.
A quick PM to JB would have cleared this all up for you.
BTW...you may wish to ask the Mods to move this from the W/FS section, as this does not exactly meet the criteria. The Main section would have likely been more appropriate.