You may want to get yourself on a list. They range from 2-5 years if you are looking for a handmade concertina reeded instrument. You might get lucky if you check the for sale forum with a used one. Occasionally The Button Box has a quality concertina reeded instrument. They even had a Dipper for awhile last year. Checking this forum will sometimes turn up a used good instrument. I have also heard some nice things about 7mount concertinas though I have never touched one. And the Clare Concertina Company has come up with a vintage model with concertina reeds, again I don't know anyone who has owned one. My limited experience seems to be with a flock of Dippers here in Chicago, the Conner I learned on, and a couple of Jeffries and Wheatstones I've heard at sessions over they years. These would be a step up from a Morse due to their reeds. I've also heard some nice Lachenal's but their action might not be as fast as your Morse. I have heard good things about the Morse Hybrid's so I assume you are not looking for another hybrid, but rather a step up to concertina reeds, but I may be wrong. I was either lucky or unlucky enough to get my concertina before the hybrids became a thing so I was never tempted to go that route. I'd love to visit that magical shop full of concertinas that I think only lives in my imagination on this continent. I did buy my Connor from Chris Alger years ago, and his shop is the only one I know of that is actually that magical place, but it is out of my driving range so I'll never sit down there. In those days I just called him and told him my needs and my budget and he sent me an instrument that I've enjoyed a great deal for the past two decades. But now there is the internet so you can visually browse at least. Forgive me if I am boring you with information you already know and good luck on your search.