sunfish,
This might not be of any help for you, but anyway...
I'm a distributor at greencoffeebuyingclub, where we split bags of coffee and have fun doing it. I have sent green coffee all over the world. But, I think Singapore has some restrictions on green coffee being imported. That, plus the postage on a 15# box is somewhere around $60. It would be interesting to see what the freight to you would be on a few whole bags, if you can find some people local to you to split them.
peter