I ordered some moss from this vendor and we started emailing back and forth. Turns out she's really cool about helping to get you what your looking for. She threw in some ferns with my moss and my order came within 3 days time. And she's very inexpensive- absurdly cheap. I actually ended up with too much moss for less than $12. Anyway, she has an eBay store, or something like that. Her username is:
I recommend her for moss and plants.