Levi's makes their 514 in different fabric and different colors - some fabrics are better than the others. Have you checked out all of them?
For starter: http://www.amazon.com/Levis-Mens-Straight-Covered-35Wx30L/dp/B00GA7ULTC/ref=sr_1_1?ie=UTF8&qid=1392858418&sr=8-1&keywords=levi%27s+514
After the last few posts re the length of the boots being different, I took a look of my 1.5 year old and noticed that the right boot is ~1/4" shorter than the left one as well.
Not enough to bother me, but it just seems like it is quite common