fundj, I simply let them chill for several hours in the lightly oiled texas muffin pans, unmould, then wrap them in greaseproof paper, then a layer of foil.
Luckily I have a large fridge outside, so I have just stored them in an open container in the chiller section. I'm sure any part of the fridge is fine.
Have just used up the final paste from last years batch, and it was as good as it was made fresh.
I love your fancy shaped pastes too