Looking for round marble table with matching marble stools.

Also looking for water reed or bamboo woven patio furniture set.

It depends where you are mate, in you're in Bangkok try heading to some of the following:

Homeworks at Central Bangna, there's a nice (limited) selection of lawn furniture there.

You can also try HomePro over at Ploenchit.

Index Living Mall on Bangna, not far from Central Bangna and I believe there's another branch on the other side of town.

Another option(s) if you are willing to go a little bit more, there's the open markets which you can find or the roadside sellers.