Proprietor To One Person Company (OPC)

Sir, I am Architect practising as architectural consultant ( sole proprietor). Most of my clients are Central govt. and PSU's. Now I wish to register as OPC for better visibility. ( as few PSU's are asking for a company registration as part of tender eligibility but not all companies.) As a proprietor I have good experience and I qualify their eligibility conditions for the most of the tenders posted by PSU's. (except for the few who ask for company registration). If I upgrade to OPC then there will be date of incorporation. The problem here is I will lose all the experience and I cannot participate in any bid because of date of incorporation. Because in all the govt. tenders they will ask for minimum 5 year experience and completion of previous projects. As OPC is new and it won't be having any experience on the title of OPC. Is there anything I can do in a legally accepted manner that I register as OPC and get all my experience I have as proprietor to One person company?