Architect to supply Working drawings for Extension

I need someone to draw up the working drawings for my extension, my current architect is busy and they are needed for me to gain quotes for builders.

Calculations and schedule for footings, insulation, location of water works, drainage is also required

I currently have hand drawn plans approved by planning
Structural calculations from structural engineer
Kitchen drawings
I am awaiting SAP calculations from energy co for heat loss

This is not suitable for a cad designer without architectural experience