The Commodore A2320 is the original "fixer". There are many others but you can't go wrong with the A2320.
That does look good, though these do seem to be pretty rare. If really need a solution I can easily buy now, at the right price of course.
Keep forgetting about these. Even though I use the AGA versions in my A1200 and A4000.
The Indivision OCS/ECS V4. You can get older off eBay or Amibay.
https://icomp.de/shop-icomp/en/shop/product/Flickerfixer_Scandoubler.html?flifi_type=OCS_ECS
