Fast bet on those is the auction sites, and you will pay a premium if in that kind of hurry.
Reason being, The Ilion, NY move FAILED miserably. The workers sucked.
The state of NY sucked even more, so now they're loosing the whole shebang to Alabama.
And Pre-2005 Marlins are also selling at a premium due to the "No More" factor...
Kentucky, on the other hand, is doing so well they can't keep up with demand...
too bad they didn't have more lines in that site...really needs more space & lines.
If not in a hurry, watch your pawn shops regularly. Same for your regular LGS's.
Leave a biz card saying I Want one of THESE, and name/number.
If a shop has a "Wish List" book, be in it. Call/visit at least every other month.
And when you DO get one, make sure you update with the shops you left notes at...
they will REMEMBER that...then put your next WANT on the list
Third thing to do...get into your local SASS/Cowboy Shoot scene.
There are TONS of those carbines at shoots, get known, and get info.
A posted note on the group's webpage in their Want-ads works wonders.
"New shooter, has pistol, needs a carbine..."etc...
Hope that helps