I did some research into this cause I did not understand your question at first as dragons can be found in any plane but are only native to the Prime plane other then Gem Dragons, Force Dragons and Prism' Dragons. So to answer your question I have to first state that the Question I am answering is their Dragons who live in Arcadia the Answer is yes.
Emerald Dragons and Sapphire Dragons and obviously Force Dragons and Prism Dragons.
Radiant Dragons from the Draconomicon.
Any Metallic Dragon of Lawful Alignment could be found there realistically.
As is their a Specific Planar dragon that was native to Arcadia, Not OUT SIDE DRAGON MAG's their is another out planar realm that is host to dragon gods an their servants but Arcadia is for humanoid gods and their like. The Dragon Peaceful(if you can call a dragon realm peaceful) realm is called the Dragon Eyrie from the Players Guide to Faerun.
But Dragon Magazine #321 Has a few; The Adamantine Dragon from Bytopia, the Arboreal Dragon from Avendor, the Axial Dragon from Mechanus, the Beast Dragon from the Beastlands and the Concordant Dragon from the distant outlands.