Tony Hwang wrote:

Hi,
My Carrier furnace control board quit working.
Trouble-shooting revealed bad relay driving inducer motor.
12V DC coil with 1/4Hp 120V AC rated Takamisawa brand relay.
(LZ-B12VM-C is exact model no.)
Where could I get something like this?
TIA,
Tony

If you are looking for some exact replacement, it will be tough.

If you're willing to "adapt" something, try these places:

http://www.allelectronics.com/
http://www.hosfelt.com/

Besides the AC current rating, watch the coil resistance.

Jim