Hi !
LMFVauxhall sells modified Sachs clutches and flywheel kits, but they're mostly aimed at turbo-diesel models (they still need a dual mass flywheel in order not to destroy the gearbox).
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New members with less than 10 posts are not allowed to post up any URL links or photos, this helps to deter spammers! Thanks for your understanding buddy.
Petrol models can use a reinforced and lightened solid flywheel, I know there are at least ones for Astras, so you should find some for the Veccy.
Sachs clutches are also considered as stronger, even unmodified OEM.