You can get a Park Tool mini-chain Brute for about the cost of a cheap chain. Pop the broken links out and put the chain back together. However I have a shimano HG-53 on one bike and the only reason it's still on there is because I can't remove it!! I can't get the pins to budge more than a millimeter or so with my chain tool and I tried about 5 different pins. Be glad your chain broke and just get a SRAM PC-59.