This was mentioned elsewhere but I thought it was cool enough to deserve it’s own post. The artist is Dusty Abell and they are selling copies on their website here: https://www.dustyabell.com/products/star-trek-doctor-who-friendship-is-universal-print
They’re 27"×40" posters in a limited print run and on good quality paper stock. Plus, the artist promises he’ll ship as many different prints as you want at the same $10 rate. Sounds like a fair deal to me.