V. Stiviano -- At Least I'm Good For the Visor Biz

If you ever thought about getting into the multi-colored visor business, now's a great time -- 'cause V. Stiviano's love for face covers started a boom.

We spoke with a company who sells the colored visors online ... and the guy who runs it says sales are SOARING following the drama surrounding Donald Sterling's racist rant.

The company went from selling around 5 a day, to at least 100 ... with red and blue selling the most -- the same colors V's been sporting around town.

No one has outright said they made the purchase because of her but the owner says he can't single out any other reason for the sudden interest.