I dare you to find Bob the Builder toys.
I spent last night running around town looking for Bob the Builder toys and had no luck. We called at least 5 thrift stores after the big shops (ToysRUs, Walmart, Target, etc) were a bust.
In the end though it all worked out; we changed the boy's birthday party theme to just "construction" and it was a big hit.
Also, easiest cake I ever made.