Sorry I don't have any more time to look for them tonight. I lost the bookmarks, I think they were on the other computer before it crashed. I was looking for suppliers for the raw elements before also, and was not able to find any that sold to the general public in small quantities. but the bookmarks I found I found by accident, then bookmarked them. Once I get the keyword phrase correct I should be able to find them again. Although the two I found were both hydroponic stores.
I would suggest, typing up a letter with what you are looking for, and what you wanted to use them for in a text document. Then do a search for hydroponic supply stores all around your area, and even out of state. Copy and paste the letter into an e-mail (from the contact us page) then e-mail it to all of them. Your bound to get a lead. Once you find one you should be able to call them to ask questions, and probably get even more leads from that.