Sunroof corners

Hi guys are the plastic corners that go in the td5 sunroofs for the drains available to but singly? As one of mine is weeping slightly but have another sunroof with snapped ones on it, was just going to repair the one I've got off save having to take mine out and wait for it to dry before fitting it.

No u can't buy them, it has to be repair and reseal with something like Silkaflex sealent