I am offering free testnet Bitcoin but for large transactions like you want 1 tBTC, I am asking for explanation and purpose why you need this amount.
Another request is to return this coins to me when you finish whatever you are doing.
If you can respect what I am asking please contact me with more information or write them here publicly.
This is my Free Testnet Bitcoins topic in Services:
https://bitcointalk.org/index.php?topic=5278247