I was fortunates to acquire this 6 1/2" .44 Special Target a few years ago. It is still the most $ I have ever paid for a S&W although I've sold one for more money.
Of course, I have no regret. It is a fine shooting revolver but the sight combination is difficult for my eyes to see and I'm not about to rework the sights. This is a three digit special order with butt swivel removed for shooting with the Sanderson grips.
Seems to me, the problem is not so much finding a triple lock as it is finding a good one.