you need something called 'emalgamating tape' i spent hours lookin or some for mine, in the end i ended up with simple double sided foam, and there still fixed on from last summer
3M double sided foam tape is highly recommended, the small width not the wide width, i think its also what most bodyshops use to stick on old badges with.
If you find the foam tape that you can use with the 3M activator, get both the tape and the activator and you will never get them off its that good