Elroy Jetson said..
If you want the cheapest possible job then meet the tradie on site and tell them you will be there to pay them when its time to fit the finished product.
Even more effective - if one of the other drawers fits - take it and the damaged drawer to the tradies workshop yourself and just ask him to make a copy.
Measure how deep the gap is behind the drawers, so at the same time he can knock up a block to stop the drawers being damaged.
Any tradie would be much happier as there is no lost time visiting properties and excess paperwork.
If you are lucky - the apprentice will get the job as part of the learning curve - and it might only cost a carton or so.
We often had little jobs like this when I did my apprenticeship.
hint......Balga TAFE is where timber tradies are taught in Perth these days
stephen