Electronic commerce services for customized manufacturing, namely, providing business procurement and purchase management, implementation, and consulting services in the nature of on-line and electronic vendor selection, specification-writing, distribution of solicitations and proposals, approving, ordering, auctioning, bidding, awarding, production milestone scheduling, process managing, invoicing for a wide variety of customized goods and services, and disbursing payments from an escrow account to suppliers of such customized goods and services, featuring user-customized purchasing preferences, procedures, and reporting for clients