Thank you both! Looks like rockauto has them:
http://www.rockauto.com/catalog/moreinfo.php?pk=5792124&cc=1303940&jnid=524&jpid=7
How much would this have to be bent in order to cause the tire cupping pictured?
It's not a matter of degree that determs how bad the tire will get.. basically this is a prime example of why I hate the whole "Stance" stupid ness. Tires are designed to ride straight up and down as well as inline relative to the vehicle they are mounted on.
Part of the job of your suspension components is to keep these things "inline" regardless how much the suspension is traveling. Now there will be some obvious deflection if the suspension is fully compressed vs fully unloaded. Hence why most of the tie a alignment is required after lowering a car to ensure everything is squared away. but 90% of the time your tires ride straight up and down, unless obviosuly something is out of line or broken in the suspension..
All it takes is the tire to be ridden on say .07 degrees or so off of it's "true" axis and this CAN be the end result.
Honestly they look like snow tires, meaning they have steel belts inside the tire that help them retain their shape from being beat to hell on the roads/bumps.. Once these belts break they will also cause the same affect to the tire, making the tires warp
Add these two problems together and you are now compounding the issue ontop of itself.. Basically this will KILL tires VERY quickly, just like the morons who "stance" their cars. Sorry for those that do the whole "stance scene" but your stupid, and have ZERO knowledge of how/why your stupid and I basically explained why, see above sentences
Back to the task at hand.. So lets recap shall we?? Broken/bent suspension components put extra stress on the tires (and everything else mind you) and the tires themselves being belt radials have certain steel belts the run the circumference of the tire.. When these break or are out of line they will cause the tire to dis form and do what you are experiencing here.. not ALL the time.. but most of the time.
Again I can't help but stress this. Make sure the tires IF DIRECTIONAL (which they appear to be) are mounted so they roll the CORRECT direction.. <---This will ALSO kill a tire VERY quickly.