Security wiring question - how to get wires out of walls....

[The OTHER Kevin in San Diego <skiddz "AT" adelphia "DOT" net>]

My home was pre-wired for a security system when it was built 4 years
ago.  Only 4 of the 5 external doors and none of the windows had the
wire stubbed out where you could get to it.  The 4 doors had the upper
jamb pre-drilled and a plug with the wire tied to it was inserted.
Piece of cake to pull the plug out, put a contact on the wire and
connect it to my panel.  (HAI OMNI II)

I've got a wire finder that I've used to find buried wires in the yard
for my exernal wiring so I havet a pretty good idea of where the
wiring in the walls is, but short of a borescope and a long wire hook,
how would security guys fish these things out in a situation like
this??

I am capable of cutting/repairing/repainting the drywall, but I really
don't want to get into that if possible.

The contractor who pre-wired the house said they'd be happy to come
out and fish the wires out for me, but I'm a DIY'er and would prefer
to spend my time doing it instead of writing a check.

Ideas/suggestions?

Thx!