Hi,
I have an Arxon Scandoubler (it's not a flickerfixer as well, but it works well) which I will be giving away since I already pre-ordered the Indivision scandoubler for my A4000.
Works fine with AGA and is currently connected to the input of my PicolloSD64 card.
And BTW, it's a Video slot card, not a Zorro one... ;-)
If you're interested, let me know...