You can maybe look at DIY a spawning mop... here is a guide from PFK website:
DIY Guide: http://www.practicalfishkeeping.co.uk/content.php?sid=4302
Its meant to help in spawning egg-laying fishes, but can also work nicely as artificial hiding places for fry too.
The other alternative is to just buy a cup or packet of java moss from LFS, then let it grow floating in the water column, eventually it will grow in a large clump of floating moss, very good for fry as they can hide in it as well as eat the tiny micro-fauna living amongst the moss.
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