508 Compliant to determine is the software has a Voluntary Product Assessment Template (VPAT)

I am trying to obtain the 508 compliant Voluntary Product Assessment Template (VPAT) for R Studio. The federal government must ensure that all hardware and software have a VPAT. Can anyone point me in the right direction or provide me with a point of contact I can ask. If your product is not 508 complaint, please let ne know.