Wholesale Information & Products Guide:

WHOLESALE  (Definition)
The selling of goods to merchants; usually in large quantities for resale to consumers.

Other Wholesale Directories:
ThomasNet.Com
WholesaleCentral.Com
Wholesale411.Com
WholesaleGopher.Com
TopTenWholesale.Com

Another good source for wholesale products are the major search engines like Google and Yahoo.
Try searching these popular wholesale terms:
Wholesale Products
Wholesale Merchandise
Wholesale Distributor
Wholesale Supplier
Wholesale Companies
Wholesale General Merchandise

You can get industry specific information on wholesale from the US Census Bureau.  This information is updated monthly.
US Census Bureau / Wholesale Trade

Need information about working within the wholesale industry?  The US Department of Labor has complete statistical information on the wholesale industry.  The following is an excerpt from the US Labor website:  "The size and scope of firms in the wholesale trade industry vary greatly. Wholesale trade firms sell any and every type of good. Customers of wholesale trade firms buy goods for use in making other products, as in the case of a bicycle manufacturer that purchases steel tubing, wire cables, and paint. Customers also may purchase items for use in the course of daily operations, as when a corporation buys office furniture, paper clips, or computers, or for resale to the public, as does a department store that purchases socks, flatware, or televisions. Wholesalers may offer only a few items for sale, perhaps all made by one manufacturer, or they may offer thousands of items produced by hundreds of different manufacturers. Some wholesalers sell only a narrow range of goods, such as very specialized machine tools; while others sell a broad range of goods, such as all the supplies necessary to open a new store, including shelving, light fixtures, wallpaper, floor coverings, signs, cash registers, accounting ledgers, and perhaps even some merchandise for resale."
You can read the complete article and gather a lot of wholesale trade information on their website here:
http://www.bls.gov/oco/cg/cgs026.htm

Don't forget to check Ebay for wholesale goods!  Ebay has dedicated an entire business section to the wholesale trade and there are many good deals to be found, but you need to search carefully.  Be sure to check shipping rates, as many sellers charge an inflated rate to increase their profits.  The Wholesale section for Ebay can be found here:
Ebay Wholesale