According to Ravelry's yarn index, Colinette Point 5 is a "Super Bulky" weight yarn which needs a US 17 or 12.75 mm knitting needle to get gauge of 7 stitches per 4 inches. Classic Elite Tigress is also a "Super Bulky."
So you could substitute other "super bulky" wool yarn that have a similar look and feel.
You can tell the weight of a yarn by looking at the label: super fine, fine, light, medium, bulky, super bulky. Most yarn labels will give you a basic idea of what the yarn should knit up to gauge.
I agree that you should use Ravelry to look up specific patterns and then check the projects others have done, because they'll often use different yarns and you can get an idea of what works and doesn't work.