EcoVictory garage fob replacement part

The part of my keyfob that the bottom half screws into, doesn't have a robust hole for the screw to go in, and over the years it's been re-glued too often to repair.  Having to squeeze the fob in one hand so the battery makes contact and you can press the button with the other hand, got tiresome.

So, I measured it and this is a nearly-there replacement part for it.  It fits into the original keyfob and accepts the screw that holds the parts and the battery together.

It's not perfect; the top is flat rather than rounded to match the surrounding part.  It's high on the sides, and low on the end, but it's near enough and it makes the battery contact reliable again.  Included is the FreeCad source if you can shape it better.