Artificial Moss

I need about 1m x 1m

You may have a difficult time finding the artificial foam ... mostly in the arts / crafts stores, you will find dried moss and plants in the air like Spanish moss, which were dried and painted. Sometimes they were treated with glycerin to make them flexible. I gathered lichen from the branches of fallen trees and spray painted for use in arrangements.

At a craft store or a store that sells artificial flowers. Hobby Lobby, Michael, etc.

a craft store, like Hobby Lobby, Michaels, even Walmart

and I bet they have at least one Walmart in Singapore