How to create PDF larger than printer (to print at UPS Store, 24" x 36" !!TIME CRUNCH HERE!!

I have a landscape design that needs to be printed on 24" x 36" paper.  We will be taking it to the local UPS store for printing.  They prefer PDF files to work with.  I currently have my design on a custom page of 24" x 36".  How can I get CorelDraw x7 to create a 24x36 PDF when my printer at home won't print larger than legal?

Thanks,

Lisa