I believe (if I remember correctly) that the stuff from last year was glued on, whereas the 3M stuff from this year is sticky-back. This shouldn't effect you, but just throwing that out there. I don't know what your budget is, but AndyMark does have it for sale. Each roll is enough for half of one end of a field.
http://www.andymark.com/product-p/am-2465.htm