i've got a pair of the alloy machined ones somewhere, not sure about the fixing kits for them though
the front mounts that go into the chassis legs are the height adjustable ones via a torx screw underneath and accessed via a hole in the bumper
but make sure you don't strip the threads when adjusting them, then they are fucked as they are moulded into the bumper
you will also need to make sure the rubber inserts that they sit in are in good order as if they have rotted no amount of adjusting will fix them
it's also worth drilling a hole through to put some bolts in, otherwise the front bumper is very easily removed with only 2 plastic fittings holding it in place