I think, OP, that you need to instigate your own tailored version of knobhead bingo.
All hou need to do is have a few stock phrases that you can cross off in your head every time he utters them (this will help you grey rock him).
You could have …
I’ll remember that next time you’re ill.
I’ll have that in mind next time you want a favour.
I don’t have any [insert item] at home.
I will drop them off instead at 7am.
I will be three hours early because I need to drop the car off / give a colleague a lift / get my hair cut / insert as appropriate.
I’m sure there are plenty of other lame excuses you could add.
When you get a full card you can shout TWATOOOOOOO!
Oh, and I don’t believe what he said about twinnie being sick either.
But you are MARVELLOUS in keeping your cool.
😎