
Assuming txscript is required, the following result was found.
This article is so that I don't spend so long in googling what the TxScript referenced assembly is when creating an SSIS custom component. How? This is simply the "Script Component" under "Extensions". No MSDN website said this... obvious to Microsoft...

bc1qf6elrdxc968h0k673l2djc9wrpazhqtxw8qqp4
0xb038962F3809b425D661EF5D22294Cf45E02FebF