i think you are referring to the coupon booklet that you can receive when you buy your passes online.
in some cases, the coupon booklet is issued at the hotel for those that have purchased a package stay.
the coupon you are seeking is not just one coupon that park guests can get but it is in the coupon booklet with other ones.
there is a thread on page 2 of the forum that shows the coupon booklet.
check the online coupons that donald duck posted.
you might find some in there that are of interest to you.