*Canadian broadcast regulator rejected first proposal. Nov 19- BCE Inc, Canada's biggest telecom provider, has presented a revised proposal to buy Astral Media Inc to broadcast regulators, aiming to win approval of a plan to expand its media presence the second time around.
Nov 19- BCE Inc, Canada's biggest telecom company, is seeking regulatory approval for a revised C $3 billion plan to take over Astral Media Inc after the country's broadcast regulator rejected its previous bid.