Convert from .stl/sldprt to .igs

Hello,

for my final project i have to make some parts and drawings in SW 2011. But those i need to convert to .igs file.

I have the .stl or .sldprt file but it seems i can't convert it with the version that i have as a student . Already have searched it on google but there is no good program.

Could somebody help me out who has a professional version ? There are 2 parts to be made.

I would be gratefull if somebody is willing to help me. If somebody should want to help me out just sent or write your email adress here.

Thanks in advance

SolidworksImport export