Daisy,
I'm not sure how the C/A would supply a copy of the contract via telephone? You're not physically holding anything (but the phone) during a verbal discussion. I must have misread your question?? Either that or the agent you spoke with is completely out to lunch.
In regards to P.I.P.E.D.A and what all it 'incorporates', here's a link to the act:
http://laws.justice.gc.ca/en/ShowFullDoc/cs/P-8.6///en
The template I provided you should send a msg to Cap1 which indicates you are both on a fact finding mission, and that you are familiarizing yourself with laws pertaining to the collection of debts. At the very least, you'll grab someone's attention and more then likely that will spawn a few conversations around a water cooler at their office.
Also, be sure to insert some firmly worded language which indicates that they have failed to supply you with this specific contract, and above all, it is to be included with the package they return to you.
If they fail to supply you with a copy of the contract your husband has supposedly signed, then you may wish to send them a Cease and Desist letter afterwards which will also request [in it] that they take the matter to court. I have a template for this too, which I put together a few months ago and have had a ~90% success rate with. Currently, I only have one ignorant agency who continues to call from time to time.
You, too, may wish to ramp up on the Prohibited Practices and Methods in the Collection of Debts. It's a fairly easy read, and having a little extra knowledge in the area will only help strengthen your position.
http://www.e-laws.gov.on.ca/html/regs/english/elaws_regs_900074_e.htm#BK6