Civil Cells - Entry Turn LH ln LHD with additional acceleration lane

Hi - I'm using OpenRoads SS4 and hoping to use a civil cell for the intersection of a construction site access road onto an existing "rural" road.

The supplied "Entry Turn Ln LHD" is a good start, but it seems I need an acceleration lane for vehicles entering onto the rural through road (essentially I need to mirror the entry turn lane and extend it)

Can anyone point me toward a civil cell that would do this? Or advise how to add the acceleration lane. I'm pretty new to ORD, and ver y new to Civil Cells.

Any advice/help much appreciated.

Cheers,
Rob