What exactly are you trying to design?
At a top
level, the design of a parabolic reflector is very
straight forward and can be done yourself on Excel.
The profile is just the formula for a parabolic
curve. The ratio of focal length to diameter should
be around 0.6 for optimum efficiency.
text book will give you the gain for a given wavelength
but is approximately
Gain = 17.5+20*LOG(F*D)
where F is in GHz and D is in meters.
One of the basic books is S.Silver
Silver. Microwave Antenna Theory and Design, volume
12 of MIT Radiation Laboratory Series. McGraw-Hill,
New York, 1949
I can give you more help directly
If you are doing a detailed analysis
to consider phase errors for example and their effect
on sidelobes you something like Jassik or Skolnik.
The software suites used are based on Geometric
Theory of Optics (GTO) but I do not know of a commercial
package. A Google with those key words might give