You Australian?
They ship to aus?
I'm as Aussie as Oi! Oi! Oi! mate!
I bought mine from Seedsman some years ago. I've been around these forums (including Overgrow.com) for almost 20 years now, so I've got a lot of oldskool seeds I've picked up over the years that are no longer available.
If you want the Mental Floss, the closest you'll get these days is this MF x Sweet Island Skunk cross made by Chimera. These are original Chimera seeds, so they will be good quality, and by the looks of it the MF x SS is very close to the original MF.
www.seedbay.com
Here's everything by Chimera currently available:
https://www.seedbay.com/vendor/chimera/
These guys ship world-word.
If you search and can find a pack of Chimera's "Ultimix", do you self a favour and buy them! They are cheap and contain 30 mixed strains from Chimera and are a real bargain. I'm not trying to spam Chimera, but he's a Canadian breeder who's been around a long time and most of his stuff is quality. I also recommend Paradise Seeds, as I've grown most of their strains over the years.