Gavin, all spring and damper kits are just that, no hubs/front strut assemblies are supplied. As stated, any spring damper kit for a mk2/3 Polo will fit the G40.
You'll have to remove the damper insert from the front struts and put the new ones in.
Generally, the more you pay the better the quality of the kit. Some of the cheap ones are noted for giving a very stiff ride which isn't much good for handling or roadholding.