As one of its daily deals, THAT Daily Deal offers this Big Lebowski-Inspired Kaoru Betto T-Shirt for $9.99 with free shipping. That's the lowest total price we could find by $5. It's available in sizes S to XL. (Sizes XXL and 3XL are available for $1 and $2 more respectively.) Deal ends December 20.
Of note, a matching Vinyl Decal is available for $3.99 with free shipping.
For baseball and film buffs, Kaoru Betto was a pretty great ball player, and a similar shirt was worn by Jeff Bridges in more films than you can shake a stick at.