Supplies of the iPhone 5s have been steadily improving since the device's launch two months ago, and according to a new survey by Piper Jaffray analyst Gene Munster, supplies are now approaching demand levels at Apple's U.S. retail stores with 90% of model/location combinations currently showing as available. Munster's survey is a weekly tracker of 60 U.S. stores and has seen significant improvement in iPhone 5s availability from just 31% two weeks ago and a paltry 10% back in early October. Total available iPhone 5s SKUs (excluding unlocked) have increased to 90% from 31% two weeks ago, and 10% at the beginning of October. Separately, we note that the lightest stocked store we checked had 67% of available SKUs. We view the improvement in supply as an encouraging sign that Apple has begun
