I have internal flickerfixer/scandoubler in my desktop A1200. It's the FlickerMagicT from DCE (purchased from Vesalia for 89eur) It is originally meant for tower A1200 or A4000. It clips on Alice and Lisa. The image quality is great :-)
Note: this is not meant for desktop 1200 so some modifications must be done. For example you cannot put the HD on its original place.
More info on
amiga-hardware.com.
