The only nursery I know of that sells that type of tree is Logees. They have a good variety of cutting grown trees but they are only about 4 to 6 inches tall. When I contacted them,they told me that they were cutting grown from mature trees. They come in little 2 to 4 inch pots but they will grow.

Here is a link that might be useful: Logees

Gardner, I know you're trying to be helpful, but Logees is the worse place to buy citrus trees..and I used to be a big customer of Logees. About 4 yrs ago I ordered a variegated lemon and they sent me this half-dead 2" cutting..I was furious. They also sent some other tropicals I wasn't too happy with.
One place you can try is Parks Seeds and Plants. Someone I talk to just ordered from them and received a nice size plant..the only problem is I don't know if it's grafted or not, so you'd have to write them. Toni

I have only ordered 1 plant from them and I recieved it in excellent condition. It was ordered in Febuary and had no cold damage what so ever. I only warn others against purchasing from specific places IF many many people have had problems. One instance either by myself of others could be chalked up as a fluke. Logees has a great rating on GWD. I try to never let personal preferences come into play as most have enough sense to make up their own minds.