WASRs are a standard AKM pattern so most stock sets for stamped AKs should fit. Every country has their own idea AK spec so some stocks many require fitting. If you can live with the damage to the stock there are many methods of refinishing an AK stock and are worth looking at. If you want a new stock set something like this set from
K-Var is a good option and will be a little lighter than a wood set. If your willing and have the skill to clean up some surplus furniture something like this
Balkan Battlefield would be cool. If you go that route the stock sets are missing some hardware but you should be able to scavenge your current stock set to make it complete.
As for rails
RS Regulate is my go to. Other rails include
UltiMak,
K-Var(this one looks a bit high), and
Midwest Industries. I haven't personally used these other rails but they get good reviews for the most part.
Welcome to the dark side
I should also say when changing around furniture consider
922r compliance. This is a muddy subject and I don't have the time to attempt an explanation, look around there is plenty of info out there on the subject.