I need a Tuning Control IC for this TV and I don't
like the Daewoo's price ($25.68 with shipping) .
Is there any other source of these? It is a Toshiba
TMP47C434N-3119.

There's no other option because it's a special programmed microprocessor IC.
$25 is cheap for a microprocessor. I've seen them as high as $100.
Ron