Intercepting dme arc on A320

[LimaFoxTango]

Hi all. Is there any way to intercet a published dme arc on an approach on the A320 at any point other than at the IAF? Soo far, the only way I'm told is to create waypoints say every 10 degrees at the required distance. This can be time consuming and tedious especially if ATC gives late clearance for the approach.

For the record I don't fly the A320, just an aircraft with a similar fmc system.

Thanks