Nope, but I'm sure you could have one made.
Edit: After a quick Google check, I found a store that sells Blurtit fashions:
https://www.zazzle.com/blurtit+gifts
Are there Blurtit t-shirts on here similar to the Ask.com ones that were given out?
I'm a men's small. If you have them in V-neck, that would be great :D
I think we need a "Walter the Grump, Spam Slayer" "T" Shirt.