That stock IS unique to the C&A import guns. New production, no serial, fitted buttpad with serrated back. Stock coating is applied after buttpad is attached, resulting in coating usually overlapped onto the sides of the buttpad.
The Sporter has pretty much the same buttpad.
The C&A paras I have in the database with that stock, also all have 93xxxxxx serials. They are either EPd, or laser/dot matrix applied serials.
All of these rifles were shipped with bayos. Guns sold during the Clinton ban era had their bayos removed before being sold. Since these particular paras have 93 serials, it would make sense that many of them would be sold with no bayo, since the Clinton ban took place shortly after their production.
I can't help with any production numbers unfortunately. Standard paratroopers are not something I, nor Joe, ever tracked.