Q3, Q4: input pnp: KSA992 (mam)
Q1: KSA992  50V (mam)
Q2, Q7: BC556B, KSA992 (mam)

Q1, Q2, Q7: pnp: 2sa970, ksa992  (mam)

Q5, Q6: VAS npn, 5W:   Ccb should be 10pf
1) TTC004B perfect (mam)
2) KSC3505 or KSC3503 add 4.7pF C-B capacitors   (mam)

Q14: same as VAS above

Q50 (ccs npn): 2N5551 (100V)

Q9, Q11: drivers npn: KSA1381 To-126 (mam)
or MJE15033 (higher power) To-220 (mam)

Q8, Q10: output (npn): MJ21194  (mam)

Q12: npn: KSC1845  (mam)
Q13: npn: 2N5551 (100V)   200mW

D7: BAT81, BAT85, BAT86

D4, D5: SR504, SB530, bigger MBR1035 (10A)