Well, the others have some valid points, but I've had a trigger shoe on my Model 14-3 since I bought it in 1973. I removed it briefly a month ago and didn't notice any nasty marks on the trigger. But I can see how that could happen, especially if the shoe got a little loose and started wiggling around allowing the set screws to scratch the side of the trigger.
Personally, I like the feel and slightly longer reach the shoe gives me and I'm too cheap to pay what a good gunsmith would charge to install a target trigger. But as weatherby said, I wouldn't put one on a double-action carry gun due to the safety factor. My Model 14 is strictly a range gun.
To get back to your original question, I think both the Ace and Tyler #1 will fit most K-frame revolvers. I've seen them for sale on eBay.