The answer is pretty obvious, isn't it?
If they have annuities with no penalties remaining, then the annuities were issued some time ago. That being the case, there are all sorts of "modern" annuities that would probably not only be suitable for a move, but the owners would probably be much better off.
So, if you are lucky enough to have a list of people in that position it would be pretty much like shooting fish in a barrel. "Mr. prospect, do you want to keep getting 3% on your fixed annuity, or would you be interested in seeing something that pays you much more while deferred..." [gives you
LTC benefit] [pays lifetime guaranteed with option to turn income on and off] [fill in your own blanks, there are hundreds to suggest].
If you are looking for someone to refer that case with the $650k cash value, just PM me.