Ask HN: Looking for the closed version of the Mobitex Interface Specification

Hello HN,

For purely historical reasons, I am looking for the closed version of the Mobitex Interface Specification. The open version can be found online, but the closed version used to be shipped on a CD for a fee and there is no trace of it in the "usual places". The closed version differs from the open one in that it contains the specification of the datalink protocols. I am especially interested in the air interface protocol, which is called ROSI. The mobitex.com site recently went dark and there is no other way to get that documentation officially. Does anyone have it available?

Thanks!