I read this as "in need of good natured samples" like the samples you were working with were dickheads.
In any rate, check out the sound archive on archive.org. I found some good cricket, fire, and coyote samples on there when I was doing a cowboy song. I've also found some interesting and unusual samples to build instruments from as well.
try running certain waveforms that you have played with in some vst through a granular synth plugin then play about. often the results can sound alot like sounds within nature.
for example running a sinewave with a soft attack and release through a granular synth can make beautiful nature like textures.
This has crossed my mind. There are some very good digital recorders now that you can get for fairly cheap.
Been recording stuff like the din of a Mexican restaurant or the morning birds in my back yard with just my phone and an app. The mic on my phone isn't exactly high quality, and I've been meaning to look into one of those condenser mics that attach to my headphones/mic input, but for "placeholders" or if I don't care about lofi, having the phone handy has made capturing some stuff really convenient.
I think loop masters had couple of commercial field recordings. Also Ebay might have some nature CD's that were meant for birdwatchers but get overlooked by sound designers and film makers. The public library usually has old field recording CD,s that also get overloooked. You could call and ask.
Soundsnap is a good online resource for nature samples. It has a very simple and intuitive interface a bit like SoundCloud that allows you to listen to the samples first before you buy. Their starting prices are 5 samples for $9.