CastleMania Games currently has stock of the open source SCART coupler. This is one of those niche items that most people won’t need…but if you do, it’s a perfect solution. Please check the video above for more info and examples if you’d need it or not.
Purchase the SCART Coupler Pre-made: https://retrorgb.link/scartcoupler
Open source files to make your own: https://oshpark.com/shared_projects/13NvQe1D
3D Printed Cases for DIYers (pre-made kits already come with the case): https://laserbear.net/shop/ols/products/scart-coupler-shell-and-soldering-jig
3D Printed files to print your own: http://www.retrorgb.com/assets/3dprint/Scart_Coupler.zip
Also, I posted a (very boring) real-time video of the assembly process for anyone who wants to make their own. The footage in the main video should be more than enough for most people, however if you’d like to see everything step-by-step, you might want to skim through it.