Towards the end of my very short TC career, I came up with a partial solution to the problem of "no shows".
When either the incoming speaker or his TC would give me a last-minute call to cancel, I would ask if he had a replacement available. Amazingly, about 50% of the time, just asking this kind of gave them a virtual smack upside the head and made them realize how they were leaving our congo in the lurch. And THEY would do the scrambling to get a replacement. If he was a "D" quality speaker I really didn't care at that point.
If the TC said "no you'll have to find a replacement yourself" then this was my reply:
OM: "OK, that's fine. I'll just make a note of it in my file that your congregation handles cancellations by having the hall RECEIVING the speaker arrange for a replacement, is that right?"
(Long pause.)
Other TC: "Uhhhh, welllll, ummmmm. "
(After enough time has passed for a certain amount of discomfort to build.)
OM: "Hey, it's no big deal, I just want to make sure we're on the same page as to how cancellations should be handled. So in the future, if one of our speakers has to cancel, we'll be sure to let you know ASAP so that you can arrange a replacement. No problem."
Of those who let it go this far, about half decided to do the scramble themselves, and about half said "Yeah, OK, that's how we'll handle it." I made sure to let my successor know of these convos.
Good times.
om