My son's school supply list (PK) includs a "pillow-case style 19"x44" nap mat cover with Velcro closure".
Has anyone bought something similar? Can you share where you made your purchase?
Joyful mother to DS born 11/07 and DD born 04/10 (an unexpected HB)
Have you checked with the other school supplies at the store? That is where kindermats are found here. You could also try a large sports store like Academy or Sports Authority.