you could try contacted the webmaster and see if they could ask the grower if there's any way you could purchase a cutting or seeds. it's probably unlikely but they may be willing to do it for an arm and a leg
i found this on one website, so odds are every site selling it has a different strain genetically LOL canadian dispensaries are like that. they'll find something kind of close by description (taste, smell etc) and it becomes that.
The lineage behind Purple Space Cookies is a bit mysterious. There are a couple of different strains that seem to go by the name Purple Space Cookies. One of the most impressive is a sativa dominant hybrid bud born and bred in British Columbia. This version is a potent cross between Durban Poison and Girl Scout Cookies.
johnson genetics has a purple poison cookies which sounds pretty good, and riot seeds has a purple candy cookies which also sounds really good. your best bet is looking for a durban x cookies cross under another name