Maybe you should send an email to sales saying "I have been informed by a member of PTC's staff that there is a Mathcad worksheet collection for Prime 3.0 available as a separate product. It is possible we may wish to purchase multiple copies. Please send a list of the worksheets included in the collection". When there's possible mony on the table maybe you will get a useful answer.
Note that I phrased that very carefully, because it does not say you will purchase, or even that you may purchase, only that you may wish to 