I bought chain from one perfectly good chandler near the marina in Pula.
You can pick your own stops down the islands to Albania.
Leave Croatia at Cavtat. You'll have to decide whether you want to pay
the charges in Montenegro or not.
In Albania I suggest you enter at Orikum marina in the bay south of Vlore.
can't give you the name but there is a good chandlers in the marina at Veruda. You can either go into the marina or anchor in the well pretected bay. The holding is good in heavy mud. You can also get fuel here. Fuel on the croatian islands is rare.