Recommendations for quality VENDORS in any/all categories

My company, Premikati, is an SAP Ariba BPO Partner and is running SAP Ariba Buying software as a service for the SME space called Premikati Marketplace. This is a totally new offering as of January. SAP Ariba comes pre-loaded with 140 Vendors and 15MM items but we are adding additional highly rated vendors to give our customers more options than the standard big guys (Staples, Grainger, Cintas, SHI...) If you could please share your favorite vendors, quality diverse suppliers or even recommend your own organization if applicable. Our sourcing team will then qualify the supplier and then upload to the marketplace for our clients to purchase from. Thanks in advance!