An IKEA wardrobe flatpack slipped off the dashboard and gave the volume
knob a whack, pulling it from the (surface-mount) PCB. I've tried
soldering it back, but you know what surface-mounted PCB repairs are
like...

I think it will probably be easier to replace than repair. The bottom
left of the board reads:

FIAT 192 FRONT
VISTEON

The bottom right reads:
PWB9184
2FCF-14A608-AC

It's from a FIAT Stilo CD stereo, 2002.

Picture at:

http://www.esquivalier.com/?p=32

Any suggestions on where I might find a replacement?

Thanks,

Daniele