Where can one get 1.5 upgrade for Color 1.03 for OSX 10.6?

Afraid you would need to find a copy of the Final Cut Studio upgrade, which has been selling at a premium – when you can find it – since it was discontinued a year and a half ago. Here's anAMazon link. Open boxes, of course, are cheaper, but still costly. And if you're tempted to buy, bear in mind that Apple no longer supports any of the apps in the suite.

Good luck.

Russ