Fellow reefers often have plenty to give away since much of it needs pruning from time to time, especially chaetomorpha. Keep an eye on the forums or even post a wanted thread and I'm sure someone in your area will accommodate you.

I have some feather caulerpa if you want some. I have had it for over a year and has not gone sexual yet, touch wood. I does not hold onto the rocks as bad as some others I have had.
Here is a link to some various types of macro algae, feather is about #9
http://melevsreef.com/id/algae.html