3.3V LDO identification similar but smaller than SOT-223
A SOT89-3 package looks like a smaller version of a SOT-223.
The body will be around 4.5 mm in width, and the lead spacing is 1.5 mm or 3 mm between the centerlines of the outer leads.
Armed with an idea of the package, go to your favorite supplier and put that and your other needs into their selector.