As far as I am aware the LH Anschutz rifles in 22 Hornet that are seen very occasionally started life as Exemplar pistols in 22 Hornet. They had a LH action, however they were meant for RH pistol silhouette shooters. The pistols were a sales flop and a number were returned to Anschutz to be re-purposed. They were rebarrelled and offered as LH barrelled actions in 22 Hornet. The 22 Hornets were based on the 54 action and the 22LR Exemplar pistols were based on the 64 action.
I picked up a rifle in 22 Hornet that had been stocked. It’s a sweet action with a very light target trigger and a medium weight target barrel.
