I purchased African Violets from the Violet Barn https://www.violetbarn.com/car... a number of years ago and they always offered small, healthy starter plants in 2 1/2 inch pots but at very reasonable prices!
It looks like they have a nice selection of Hoyas to choose from too; they list them as vining type and cascading type but both would work in pots with trellises or in hanging baskets.