кажись наконец нашел
https://github.com/gogogoutham/bitcoin-raw-transaction/blob/master/sendTransaction.py
и еще несколько полезностей
http://www.righto.com/2014/02/bitcoins-hard-way-using-raw-bitcoin.html#ref5
https://www.reddit.com/r/Bitcoin/comments/2zdwr0/how_do_i_create_a_raw_transaction/
http://bitcoin.stackexchange.com/questions/30550/is-it-possible-to-create-a-transaction-in-pure-python-without-needing-to-run-bit