Jelly

99 Outback, 45,000 miles, 5,000 on Bridgestone Turangas, I lose air in right front tire at alarming rate, have had that tire restemmed, remounted, all tires remounted, re stemmed, and still found myself at 15 psi , from 30 psi in three weeks. Tire dealer says its the alloy rim flaking, can't change just one tire (AWD) and can't change just one rim to steel! has anyone else experienced this? any advice?