The best way to target Tiger trout is to find out if a nearby club stocks them, then go where they stock. To find wild ones, ask people you know who've caught them, but be aware they may not tell you where.
I believe the tiger in post 15 has a good possibility of being a wild fish based on the starved shape of the fish, i.e., long a skinny. However, since it is very rare for a stream to produce them it's probably stocked by a club.
I've caught 1 wild tiger in 45 years of trout fishing and 1 stocked tiger in the same time frame. Maybe I'll catch a couple more wild ones, since I know of streams that have them.