I'm sure I don't know, but I'm more than willing to find out for you... how many are we talking about; as the size, weight and distance of the package is everything.
It seems you want 1, and the postage weight here in the US is under one ounce, and goes for the standard weight rate of less than $.50 USD.
That being so, 1 in an envelope, at under 1 oz ought to be relatively cheap to you, too, I would think.
Send an address... I'll package one in an envelope, and send it to you.
I'll tell you what it cost, and it shouldn't be bad... but, if you think it too much, just pay me as much as it is worth to you, as I'm only interested in getting them out and doing any here a favor that I can.
Should it result in a total less than $10 US, would that be satisfactory?
Also, even 2 patches still
comes in under 1 oz here, and for the same postage rate. For $10 US, plus postage, you still might be able to pay less than $5 more in postage, I'm thinking.
Ask any questions... I'm more than willing to work with you and make you happy.