MicroPort Unix System V/At

[C'ing What's Here]

I recently bought Microport Unix System V/AT From a person who had
upgraded to a 386 system.  The package is complete with all of the disks
and manuals.  From the labels on the disks, the version numbers
are as follows:

Runtime System 1.36
Text Preperation 1.3
Software Development 1.3

I would like to know, if these are the current versions, and if
not, how might I go about getting the current versions? What would such
an update cost?

Daniel