Can some body tell me wether Avensis Bosch calipers will fit the St202?
I know they bolt straight onto a Gen7 but is it the same for the gen6?

If it helps. I know the 7gc can use the 6gc bracket to use 6gc compatible calipers.

When I looked into this for the US market the parts are nigh impossible to get without shipping them from over seas and the selection of brake pads is pretty poor, just daily driver type stuff is all I could find, no performance pads. Being that you're in the UK and that model is a local one it's probably a better possibility for you, assuming you've got a selection of higher performance brake pads than I could find.