A little cheeky but worth asking

So I just bought an HP DV3 laptop with Vista Home Premium installed and I'm eligible for a 'free' upgrade to Win7.

Now I checked the HP Win7 Upgrade FAQs before going ahead with my purchase but they never specified exactly what the 'postage costs' would be - you don't find out until you enter your laptop's Product Number and Serial Number into the upgrade website that you're going to be charged £22 to receive a couple of discs through the post.
As it turns out, I could've found out exactly how 'free' the upgrade would be by way of Google but I never suspected that HP would try ripping people off quite so much.

Anyway, when one enters their Product and Serial Numbers into the HP Upgrade site, there is also the option to enter a Coupon Code that entitles you to free delivery for your Win7 upgrade.
What I was wondering is, I don't suppose anyone happens to have one of these codes going spare? Or where I might be able to come across such a code?


Thanks in advance to anyone who can help.


edit: I feel I should clarify, prior to posting this I did try searching these boards (both the HP and Win7 sections) with all kinds of combinations of 'Win7', 'upgrade', 'HP', 'coupon' and 'postage' to no avail.

 

I'm sure if you complain enough, they'll give you a coupon code.

 

If I can find a way of complaining that is - I swear, the guy who designed HP's website previously was involved in a large-scale construction project on Minos...