Thread:Spottra/@comment-24526926-20140209195711/@comment-2170536-20140209200241

The best way I know of to get any building supplies is to check the newspaper. You have to be patient and willing to pay a lot of money for them (they rarely get listed for less than the maximum), but that's where most of them are found.

The other good way is to go to the Friends Requests page here and start sending out lots of friend requests. Many people will post building supplies and not advertise them so their friends can buy them. By adding lots of people to your friends list and then periodically cycling through their road-side shops, you should find quite a few building supplies as well.