Always fun doing a bit of detective work for these threads... While these knives do appear in the 2019 Spyderco catalog, all but the Para 3 have appeared in previous catalogs or mid-year supplements (and sometimes not consecutively even once they've been released).
Manix 2: appears in the 2017 Catalog as "NEW", but first appears in RamZar's 2016 all-mighty "Lists" thread (another shout-out to RamZar!!
Native 5: first appears in the 2017 Catalog as "NEW" and RamZar's 2017 thread
Paramilitary 2 Maxamet: appears in the 2017 Mid-Year Supplement as "NEW" and RamZar's 2017 thread
Para 3 Maxamet: shown as released in March 2018 per RamZar's 2018 thread, thus this knife should have shown in the 2018 Mid-Year Supplement but did not for some reason (they did release the Rex 45 series in that supplement though). To deepen the mystery, when the Maxamet Para 3 is first shown in the 2019 Catalog, it is not marked as "NEW" - but it's not unusual since NO knives in the most recent catalog are marked new...
Not trying to rain on anyone's parade here, just stating the facts as they stand. It certainly seems to me at the very least that the Spydercrew seems hesitant to crank the Maxamet supply chain back up as it literally tears through their machinery. I'm sure they certainly hear everyone telling them they should make more, I just would focus on the secondary market to find one rather than waiting for them to drop any moment because they appear in the 2019 Catalog. We are now 14 months past the most recent release of them (P3) and now over two years since its first appearance in any model.