Most Kentucky motors stores should have it or able to get it, I know the Newport store does have it.

Here is the redneck tip of the day depending on what your doing with it. I have used 2 inch EMT conduit before for exhaust, galvanized last longer, not pleasant to weld but it's like 10 bucks per 10 foot at the Home Depot. It has .065 wall, 2.197 OD so it's about a 1/16th under 2.25.
But it's about the redneck tech.