'usual supplier' is correct and usable in written English.
You can use the phrase when referring to someone or something that provides something on a regular basis. For example, "We always order our office supplies from our usual supplier."
Perhaps you prefer the oil your usual supplier provides; maybe it has the hearty aroma of real beef gravy.
PainCare, a medical practice with 12 locations in New Hampshire, turned to New England Compounding for the injectable steroid now under suspicion when its usual supplier ran out, said the company's chief executive, Dr. Michael J. O'Connell.
The government is now being forced to tap its sand hoard after its usual supplier, Indonesia, abruptly banned exports in February, citing the impact of a recent Singaporean construction boom on Indonesian beaches and island environments.
Kenny Milne's usual supplier of lucky white heather must have run out of stock, denying the big Falkirk defender the charm that might have prevented the appalling misfortune he experienced on a calamitous day for his team.
Her usual supplier, in California, had run out of large ones, and instead had sent her a thousand live pinheads — babies — which she'd had to supplement with a hundred and twenty-five expensive subadults from PetSmart.
In this atmosphere, the ferry boat's usual supplier of fuel oil said this week that it would no long sell fuel to the North Koreans, and 800 conservatives prepared to converge on Niigata to mount a protest.
"It wasn't from one of our usual suppliers.
Palmore and her school kitchen managers were adamant that they could not get a low-fat version from any of their usual suppliers.
There was the wine store panic when my usual suppliers were out of the Trimbach pinot gris that goes down so well with Asian food.
Compounding pharmacies often have supplies of such workhorse pain medicines as fentanyl, midazolam and propofol when the usual suppliers have run out.
Frank Sinisi, the president of Pronto, a food bank and service agency in North Bay Shore, said its usual suppliers of up to 2,000 donated turkeys for holiday distribution cautioned that "we can't make you any promises" this year.
