Bound to be others but the only place I know is http://www.fastfitexpress.com/ - they fit tow bars for the Skoda dealer I got my car from in Darlington, just down the road from Stockton. Dunno if they supply only. They are a towbar2u franchise.
2015 Cactus Feel BlueHDi
2014 Dispatch Van LWB
Ex 2013 Berlingo XTR 1.6HDi 115 owner