Welcome from Texas! I remember years ago when Taurus first introduced the PT145 and the 24/7 G1 compacts, their mags were very hard to find, too, and there was no gun rush at that time like in present time. It used to take months to receive those mags after the orders were placed. That normally happens when the gun model is too new. The same thing happened with my Ruger's.
well first the parts are made In Brazil!
as i understand it all the parts and most of the guns come in via ship, then they sit on the dock for awhile and eventually head toward the miami facility.
SO it takes time from order from the Miami facility to the Mother Ship in Brazil and back.
add to this that everytime Taurus developes a new weapon they just must make a new different magazine to fit it,and so no one but Taurus makes the magazines, no aftermarket mags usually.
add to that the fact that IF like the first generation 24/7's the comapct was the oddball and you likely have the answer.