They still roam the earth. I have an LAR Grizzly and all of the available conversion kits. They are .45 Win Mag, .357 Rem Mag, 10mm, .45 acp, .357 Grizzly Win Mag and 9mm Win Mag. It is pictured below.
These also came in .44 Mag and .50AE, but I don't have those. The Grizzly pistol is tight and accurate. It came with adjustable sights from LAR. I have corresponded with the designer and only patent holder Perry Arnett. He is interested in restarting production with additional conversion kits. He is trying to assemble assets and the right team. Hope it happens. These pistols are just so nice.