Where can I find a double ended bolt 9mm-1.25?

Okay so I recently had to tap an 8mm nut well not really nut it is part of my yamaha blaster engine. well the next biggest tap available was a 9mm tap with the pitch or thread of 1.25..... i cannot find this size and thread anywhere on the internet or stores. any help would be appreciated and any websites with this kind of bolt would be wonderful.