I haven't tried it myself but there's a mod for Amigas provided by
NeobitzThe pricing for the chip is 80usd plus shipping and it comes already assembled (but requires some soldering to the Amiga).
Here's a
Youtube Video of someone installing an S-video chip from Neobitz in an A1000
EDIT: if you want to purchase it you have to email them at
jkurtz01@gmail.com