If you draw a Venn diagram, you’ll see that Ghostbusters fans and Back to the Future fans overlap heavily. So, it should be no surprise to anyone that a shirt like this exists.
Available at Red Bubble for the passable price of $25, this shirt (available in more colors than you could ask for) posits the ultimate Ecto. An Ecto-A-Team van would be a close second, personally…
Big thanks to Grim Santo for the linky.