Painfully modeled in Solidworks because I have no other workflows outside of parametric CAD.
Both the thin and thick models are large to start, 285mm/11.2in wide.
The thick version is 3.6mm max thickness with a solid 2+mm for embedding magnets in the back or if you simply want more rigidity for display purpose. I didn't model magnet holes as I figure most slicers will let you do that easily on the fly to fit your own specific magnets.
I'm including a STEP file as well for any of you who wish to use/modify this more easily.
I didn't quite have the right colors on hand, but I'm still happy with how it looks. Lets see how yours looks with the colors you have!
The original patch can be found here: https://shop.rocketlabusa.com/products/patch-50th-electron-launch
The author marked this model as their own original creation.