Not sure what types of LFS you have around you....but what about berghia?
http://www.berghia.net/marketprice.html
Maybe you could trade something in to your LFS for a berghia....even if you ask them to rent it to you for the $6 you have in your aqua-budget.
We have a club member trying to raise them. He will either trade out a mushroom or two, or a frag of something, in exchnage for a rock with aiptasia to feed his berghia.
It may be worth asking around your neck o' the woods