Hi. Yes they did get back to me saying they can't split the packs. They did say it might be worth doing a bulk buy if there was interest. They are probably right.
It might be worth someone buying a full pack and selling them on for a small mark up + post to make it worth their while. To be honest after buying a couple of Star Cases i kind of like them better. There definitely is a use for these slide in cases if you have loose bubbles and don't want to reseal them with PVA or something other method