If I may chime in. The site Mamsboy highlighted is OK, if you want cheap inexpensive plastic pants and diapers. They are OK for short term use, but not worth your time and money past that. They are a good choice for someone wanting to try cloth and plastic pants for the first time, and not want to invest allot. You can also find these very pants and diapers on ebay, sometimes even cheaper! Just put plastic pants in the search and you should see the like pants listed.
If you do want good cloth diapers and plastic pants, try babykins. They do well, and are nice people to deal with (please be respectful though).
Others to try that are good, http://comcomfg.com/ They have great plastic pants, and they are a fair price.
http://www.angelfluff.com/nfhomefram.htm is a good source for cloth too, a bit on the pricier side, but a firm company.
http://www.lovingcomfort.com/ too is a good straightforward place for cloth and plastic pants. Somewhat pricy.
http://www.b4ns.com/index.php?PageType=GenInfo&PageContent=Welcome is a great place for German made plastic pants. Great pants, for the serious cloth diaper wearer.
http://www.plastic-pants.com/index.htm good place, good prices on plastic pants and diapers.
Oh, and a tip for someone who is looking for thick absorbent cloth diapers. Don't get real thick cloth diapers, they take much to long to clean and dry. You will do much better to get something not to heavy, and get inserts to do layers, to make a thick diaper. You can add what you want, or need and they will be much easier to wash and dry. Most of the sellers mentioned sell inserts for extra added thickness, and absorbancy. Hope this helps, and good luck ! 😉
Oh and wanted to mention http://www.kosikare.co.uk/shop/Scripts/default.asp Good British terry nappies and good price.