Hi! I purchased an alphabet for $2 on sale at Misty Mountain Designs called Dad's Tool Box. Each letter is made from a carpenter's tool. I love it. Perhaps this will work.
Sorry, I've got lots of alphas, but haven't ever seen Bob the Builder. *4u
Also never seen an alphabet like that.Push you to the top.
I didn't see the Bob alphabet, but Filip Koza had some Bob the Builder designs in his Advent calendar.