In case no one is able to swap with you, here are some alternatives...
I've made two Absorbas now, and done each with only two strands of the double worsted, which brings the yarn cost down (but doesn't change the shipping, unfortunately). They are still quite thick and cushy - and the knitting is easier.
If you search for Absorba on Ravelry, lots of folks have mentioned using multiple (i.e. 4) strands of the single weight, instead of the DW, especially if you can get it on sale somewhere locally.
One other option that people have mentioned is sharing an online order with other local knitters. Typically their shipping cost doesn't go up until you've ordered quite a bit of yarn, so you can divide the cost between several knitters and all save money. Or what I do, since I make a lot of dishcloths, is keeping adding yarn from their clearance items until just before it raises the shipping costs. At least then I feel like I've really gotten my money's worth out of the shipping charge. HTH.