We had 200 feet of chain attached to lots of rope but would have liked to have had 250 or 300. The only place you mention that has good and cheap shopping is Fiji, Suva in particular. There is an absolutely incredible hypermarche in Papeete, and a good market, but not cheap. We did not go to Tonga so no comment there.
Back in the water in Grenada - with new main and #2 and cockpit canvas (Santa came early). Will spend the winter and early spring in the Caribbean and then head to Bermuda and the northeast US. Still trying to decide if we will bring the boat to Canada, either in 2015 or 2016.