I have a bad feeling proto looked at the market sometime last year, thought 'huh, everyone running out of stock and there's clearly huge demand - i bet i could do that time for me to cash in'.
So he went out saved up a bunch of stock and opened a website. Sold it all, then encountered the problems with supply 99% of us and seemingly all vendors encounter at one point or another and are all too familiar with. Probably decided sod it and cut his profits/losses and moved onto the next thing. I'd bet you can find him selling fidget spinners down at the sunday market now!
Huge shame though, them mounts were absolutely solid.