This one isn't a bad idea. The price isn't bad either. Here is a cheaper version with a smaller shackle. I can't positively tell you without a shadow of a doubt that they are the right locks but I believe they should be correct.
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ABUS 83AL/45-300 Schlage Re...
American Lock-A1106YLW Lockout Padlock, KD, Yellow, 1/4 in. Dia.