need CAD designer

to transcribe my rudimentary drawings into a full-fledged CAD design. I already have the idea complete with dimensions, just need somebody to pop it into CAD. Might take a phone call or two to hammer out the details so the CAD drawer understands my basic concept and drawings. Ideally would nail it on the first go, but might require 1 or 2 revisions.
Basic concept is a tube of 24"L but needs to be able to also go to 18" and 36" length without changing the rest of the design.
DFM