Any retail geforce2 or radeon might do for you, most retail cards with tvout comes with an adapter to go from svideo to an rca cable.
Msi geforce2 ti for 90, leadtek geforce 2mx 200 for 48, to name some, but there are many more that has the connector.
And composite is the a/v cables, red, white, yellow usually.
Go to
Newegg.com and type in tv out in there search area, most that come up will be what you need.
Radeons have better tv out in my experience but for movies it doesn't matter to much.