I've finally pulled my finger out (as it were) and un-clicked my sole ties status to KDP for Three Hoodies One. I've had it there for over six months now and according to their exceedingly small print I'm well within my rights. I haven't had a sale for ages so it seems to be the only way.
Three Hoodies Two will appear on Amazon as did the first.
I hope they don't get nasty. I've heard some stories of whole collections being withdrawn by Amazon after someone has severed one or more book from the sole rights status. Time will tell.