If you can find pure lead (or a softer alloy) you can mix it with your WWs to have a 50/50 (WWs/pure lead) alloy. This will make your WWs go a little bit further. You have to get to know the guys at the tire shops. Your average "garage" doesn't change as many tires as a "tire shop." You need to hit up the smaller, non-chain tire shops....and be armed with beer.