The phrase "supply it with" is correct and can be used in written English.
This phrase usually means to provide something with the necessary things that it needs. For example, "She needed new glasses, so her grandparents supplied her with a new pair."
The Korean economy was melting down, and IBM, Trigem's largest customer, had rejected its bid to supply it with motherboards.
Kyrgyzstan says it needs to store water for hydroelectric power, because its neighbors will not supply it with enough electricity.
It did not even state that it had made any effort to induce its principal abroad to supply it with the necessary data.
Strategic interests dictate where China points its financial hose: these countries supply it with oil and food.
The company recently signed a massive contract with PG&E to supply it with up to 900 megawatts from its plants, whose construction will begin in 2009.
But Saudi Arabia's Western allies, many of whom supply it with arms, are growing concerned about its new assertiveness in the region and at home.
Despite severe criticism of Saudi Arabia, the US and the UK continue to supply it with munitions and provide airborne refuelling for its warplanes.
It took the company two years, for example, to establish enough contracts to supply it with cucumbers when it added them to its menu several years ago.
On Friday, the Syrian opposition declared a national demonstration to express its frustration at the American refusal to supply it with weapons.
The sand is there to secure Singapore's insatiable demand for concrete, a reminder of its vulnerability as a nation without a hinterland to supply it with vital resources.
They must supply it with important information.
