Gps aerial bolts

Hi,
Hopefully I'm posting in the right section....
Does anyone know the name and where to buy the torx like bolt that holds the cover on for the gps aerial on a disco 4
None of my bits fit it as they are slightly different from all other security bits I have. They only have 5 ponts to them and the edges are square rather than the torx which are rounded
Regards
Matt

Hi, google out XYP500240 for images to make sure that's what you need

Thanks for the reply......
From the drawings I have found those would appear to be the screws in question although none of them show the screw head in detail, I can't find any reference to the bit that I need to undo them to gain access to the bung below that is leaking. I'll try rimmer bros on Monday to see if they have what I need.
Regards
Matt.

You can get five sided security torx I got mine from ebay.