Hi, welcome to the joys of owning a mk1 Cupra R.
Sorry to say that everything you are looking for is no longer available new apart from the R badges.
You should be able to find decent used parts likes of wheel and gear knob.
Front splitters aren’t available and no used ones seem to come up for sale very often.
Car’s are frequently getting broken for parts but front bumpers are normally sold on complete with grilles and everything attached.
Just keep an eye on e bay etc as things do come up every now and again.
Your car looks good on your profile pic though.