7f33ac1a_ecp_cc__Value_Notes
[Part] BUF1, BUF2, BUF3 [Size/#] DIP-8 [Value/Notes] 
These are the output buffers. It is likely that the OPA551 is the best choice here, but try other single opamps or BUF634's to see if you can get the DC offset down. Don't forget the sockets.
ecp.cc
Value/Notes