Hilti offers no 5mm sds hammer drill bit for a Hud-2 5x25 plastic anchor.

In the past we could use a 3/16 hammer drill bit with a HUD-1 5x25 (3/16X1) plastic anchor and it would wok great. With the new HUD-2 5x25 plastic wall anchor it only fits in a 5mm drilled hole. The problem is that Hilti has no 5mm sds hammer drill bit available on the website. The smallest we can find was 6mm. Exactly what sds drill bit does Hilti expect us to use with these new plugs if they don't provide them on the website. Do they have a suggested alternative size that can meet the specifications that we can purchase from the website. I already know the that 3/16 is to small and will collapse the anchor when trying to insert it into the hole.