selecting a switchmode IC based on pinout?

[src1989]

i'm looking for websites i can put pin numbers/configurations into to find a compatible switchmode chip; original DIP-8 IC has no part code.

Pins 7/8 are commoned and are connected to the rectified mains via the primary winding. Pin 1 comes from rectified mains via a 3.3MegOhm resistor. pin 3 is GND. pin 4 N/C. etc. need to investigate the board again tomorrow...

[elektrolitr]

I used this
https://remont-aud.net/ic_power/
May be outdated, but so do most of the PWM chips

[src1989]

cheers. i was getting confused by it's use of DRV. think i've found 2 compatible ICs...