Need suggestions. 204 Ruger, Left Handed, Threaded barrel, Chassis acceptable is a must

[dave300]

Hi all,
Helping a friend whom has the predator bug.
He is a lefty, is set on a chassis and has an Omega Suppressor already, so finding something that has a threaded barrel is icing on the cake.
Can anyone suggest an over the counter rifle, 204 Ruger, Left Handed, Threaded, and that we can drop into a chassis.
Recommend any specific chassis as well, again, he is a south paw. TIA. Dave