Many of my former employers are no longer available. Because PRIA paperwork is only required for certificate holders, any former employers who aren't required to be a part of the program are irrelevant (with some exceptions).
Guidance for FAA inspectors on the administration of PRIA: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgOrders.nsf/0/1c3b938785afecc286257139006af7b5/$FILE/Order8000-88.pdf
Advisory Circular AC 120-68F:
http://www.faa.gov/documentLibrary/m...%20120-68F.pdf