450watts psu transistors and diodes replacements in india

i have zebronics psu 450 watts , i would like to keep some stock of this transistors 208c5027r, 13007 0706, 13007 1012b and secondary side -
stpr1620ct 7skwy u phl 430 stps2045ct 7sabz vw phl 009 stps2045ctc g417b vw chn 236
in india i dont know where to get these online . please guide me to get replacements for these , thank you .