Richard,
I have ASF's, so I wouldn't have a problem, but I've also heard that those on ASF's switch nicely to rats - so I wouldn't have a problem with it.
I actually have my ASF's for two very stubborn feeders who have refused rats and mice (and have never been ASF's feeders before). My first litter should be born in the next few weeks.
There are more people with access to ASF's than in the past, so I'm sure you wouldn't have problems finding buyers who have access to them.