Production drawings doing of shop display furniture/cabinetry

Hi, I need to draw up for production, 5 styles of units and a counter.
I currently only have sketches and need some advice on how they should be fixed together ( cam and dowel etc).
The units already exist and i have been asked to replace a supplier but only they have the production drawings.
I have managed to source some info but the rest was taken from a visit to one of the stores local to me.
If you can email me directly? my email is kev@thesolutionhouse.co.uk and i can send you some more info,
thanks
Kevin