Reddit mentions of iKross G70 Gaming Mouse Pad/Mat, Large 15.8"×12.6" Textured Surface & Non-Slip Rubber Base - Optimized for Computer Gamers,Graphic Designers, and All Heavy or Regular Users

There's a lot of choices that come under $15 with shipping included... How big exactly did you want?

Here's a few around the size of a QCK+:

Supermat $8: http://www.amazon.com/HandStands-15S07-Super-Mouse-Pad/dp/B000SR120M/ref=sr_1_2?ie=UTF8&qid=1419505283&sr=8-2&keywords=super+mousepad

Perixx DX-2000XL (With edge stitching, 1000 without) $12: http://www.amazon.com/Perixx-DX-2000XL-Gaming-Control-Mouse/dp/B00GB0IF50/ref=sr_1_101?ie=UTF8&qid=1419505427&sr=8-101&keywords=mousepad

iKross G70 $11: http://www.amazon.com/iKross-Quality-Textured-Surface-Non-Slip/dp/B00O1U19OG/ref=sr_1_96?ie=UTF8&qid=1419505418&sr=8-96&keywords=mousepad

Sentey (any of these large) < $11: http://www.amazon.com/Sentey%C2%AE-Mousepad-Edge-style-Standard-Friction/dp/B00IXQGSCW/ref=sr_1_108?ie=UTF8&qid=1419505427&sr=8-108&keywords=mousepad

I use this ikross thing, perfect size for me. QCK+ is too big, and every other mousepad apart from ones that used to come with graphics cards are too small, width wise, they are like squares and I personally prefer the rectangular ones, lol.
https://www.amazon.co.uk/gp/product/B00O1U19OG/ref=oh_aui_detailpage_o00_s01?ie=UTF8&th=1

http://www.amazon.com/Glorious-Extended-Gaming-Mouse-Mat/dp/B00J2EF4K6/ref=sr_1_2?ie=UTF8&qid=1425250517&sr=8-2&keywords=mouse+mat

http://www.amazon.com/iKross-Quality-Textured-Surface-Non-Slip/dp/B00O1U19OG/ref=sr_1_16?ie=UTF8&qid=1425250517&sr=8-16&keywords=mouse+mat

The QCK is also a good pad, a bit larger than your average pad.

Medium 320x250

Med-Large 330x280

Large 400x320

Extra Large 450x350

i use this one

http://www.amazon.com/iKross-Quality-Textured-Surface-Non-Slip/dp/B00O1U19OG

It's honestly great, doesn't slip and has a smooth surface. Plus, it's really cheap