If the bad parts are discrete transistors, as you infer, you might try Googling the parts numbers. Very often seemingly unobtainable transistors and ICs can actually be found from sources in the Far East. I have had to do it twice, and I am 2 for 2 on success. You've got nothing to lose by trying. And you may solve your problem for a few dollars or a few pounds.
Dead Oracle
Help my Oracle power supply hs given up t ghost andi cannot aford the replacement a it would cost nearly 2000.00 pounds I am retired so i am after a second hand one. We have tried to fix it and found that the drive transistors which activat the Hall efect mor are kaput but I cannot find the equivalent. So if any one has any of these spare or have an idea to sort the problem i would really appreciate it as there are 2000 plus records to play TIA