Squirt is available in cans here, regular but not diet. I used to see the diet in the liter (or whatever they are) bottles, now I don’t see those at all. I’d love to find the diet cans locally, but I’ve never found it, not once after over 25 years here. We’ve asked a store or two about a...
This is the place I buy my diet squirt from:
https://soda-emporium.com/default.aspx
Shipping has been reliable and none of the cans (I’ve ordered several times) have been damaged.