That's kind of you.  
Doubtful that the coupon code is specific to your postcard.  I got one, too.  May as well go ahead and post it.  
If I can find mine, I'll do likewise.  But I may have tossed it.
Addendum -- I did find the postcard and you are wise to keep it to a PM.  I wonder if the "Security Code" is specific to individuals and pulls up name and home address info as a catalogue number would.  And then there's the nine-digit "Rebate Number" you have to submit.
REI uses a short simple code via e-mail and everyone gets the same code.
It's been awhile since I ordered anything from Cabela's, the sales on items I've been interested in just haven't warranted the shipping cost.