You send me a PM so I will post my view here. The inputs has a high (> 1 BTC) value and thus has a chance (even though its low) to get confirmed without a fee. Since this is the easiest solution that does not require anyone handling any unprotected private keys and you appear to be rather helpless in terms of private keys. I will rebroadcast the raw tx[1] every 10 minutes with my node. This makes sure that the transaction is well known within the network and gives it a higher chance to get confirmed. If its confirmed or you rather want to try a more complex double spend please send me a PM so I can stop the script.

[1] as found here https://blockchain.info/tx/fe09397d068f68fc3656d345e8e6621a3b7a1e301e50dd7884a84e42128ca6d9?format=hex