Air Pod Pro Ear tip size

I need a smaller ear tip; smaller than smallest size that came with my air pod pros. Can I order a smaller ear tip? As it is, I have to jam them in my ear canal just to get a good seal ... and then shortly after, the air pod slips out slightly ... just enough to lose fidelity in the sound. I have a set of wired earbuds that work well for me (minus the features inherent in the Air Pods.) Upon examining them, the ear tips are, in fact, smaller than the smallest size that came with the Air pods. I like rich sounding bass and the airpods only produce good bass when there's a good seal. Other than the fitting issue and the lack of bass, I like the features of these ear buds. But at $249 dollars I expect a suitable ear tip that fits. Surely, I'm not the only one with this issue and Apple must have others available.