Youch,
no clue how you wasted the tires in a year! I put 16K on mine then switched to my 17's, back to my KDW's now and another 3K miles.
They have held up well for me, not that I do much Canyon Carving. Treadwear is rated near 300 isn't it?
Cheap 17's are a tough find, that I know! Try the normal sources like Ebay, CEG Classifieds. Use searches like "Focus Wheels" "4x108" and you might find sumin decent.
For cheap good tires, you can go with Nitto 450's, Sumitomo HTRZII's. If your an SVTOA member discounttires.com will give you a good discount, as well as free shipping.