Yep. KSC2073 replaces the 2sd313D and the 2sc234 in this instance.
and the ksc2383 replaces the 2sc373.
2-1n4007 should be ok for the 1s1850 diode. Tie together the banded ends of the 1n4007, Then install the NON BANDED ENDS in the two outer holes with the 3rd (tied together legs, in the last hole. Solder to board. bodies should be 1/8 to 1/4" off the board.
Thank you very much Larry. This is a big help! I did manage to find this part online but they wanted 19 bucks. REALLY? I don't mind paying what something is worth but come on.. anyway, here she is being tested.