Personally, even after only 1k miles, would fit a new one, they're only £15 from GSF for genuine. Trouble is with rubber gaskets is that they shrink a little due to heat and the chances of getting a perfect seal after removal/replacement is not good. You could use a good silicone gasket seal all the way round but that's messy and you're half way towards the cost of a new gasket anyway.
Also, have you considered that the leak may be coming from the cam chain tensioner? If this is leaking, the oil travels into the half moon shaped cutout in the cylinder head, I had this exact problem when I did mine and ended up replacing the gaskets for this also, a new gasket set is only about £8 from Audi.