CS1676 and CS1677 transistor replacement

[worthiersky8]

So I am going to re cap and replace the transistors in a Realistic STA-76. I have found replacement caps and transistors for everything except transistors on the the main amp board and power board. They are FCS1676 and FCS1677, I have found a few old post on here with couple of different replacements but can't really find the replacements as they are now too old and my with limited knowledge about transistors don't know how to manually search for replacements.
So if any one knows what will please help me out.