Multiple paste buffer

How do you guys solve this?
I have a couple of samples, all similar but not the same and need to paste them almost randomly to picture. It is a flickering neon light that is featured in a scene.
I could create a KONTAKT sample instrument for that, but it would be so much more convenient to just say (paste 1, paste 7, paste 4…)
I have already tried multiple clipboard tools for mac, they seem to capture some sort of XML code pointing to a file in Nuendo, but it does not actually do anything.

Again, since I cannot possibly be the only one with the problem - how do you guys solve this fast and efficiently?