Where to buy one spur gear ?

Hello:

I need a 1" 24 tooth spur gear with one bore at one end, and another at the
other end to modify a machine...I can come up with more technical specs to
describe it better, but have only found it in lengths so far in the
meanwhile.

Any suggestions where I can buy one piece, even with one bore all the way
thru would do the job.

Thanks

Murray