Lens correction for Tamron 17-50 2.8

Does anyone have a lens correction profile for the Tamron 17-50 2.8 Asperical LD XR DiII SP (what a long name) that I can use in Pentax Dig Cam Util 4, ufraw or any other free raw processing package?
I love the lens, but could do with a way of removing the slight distortions that are inevitable with this type of lens.
Rob