Exelis ENVI IDL GUI programming

Hi, We are looking for someone who has programming experience in IDL to build a GUI for ENVI for built in math function. You must have excellent knowledge of IDL 8.3 for this AND access to the program. Basically, we want a GUI for the code here: [login to view URL] with parameters being the: -input file -the size of the disk -output file it needs to retain all the spatial information of the file. The input file might have NANs. The output needs to be in the best type (integer, byte etc.) Thanks!