C# Source Code Edit

I had some software made in C# by a coder on this site earlier this year. The software works fine but I want a couple of small changes made. For some reason I'm unable to contact the coder himself and I'm looking for someone else to make the changes. The first is to introduce a small "working" sign when the software starts its work and the second is to make the interface a little more "solid looking", just beef it up a little and look more substantial. I also would like the person to provide some ongoing support by way of fixing any bugs for a period of a couple of months or so starting mid September. The current software works on pc's and in addition I'd be interested in anybody that can rewrite the source so that there is a version for macs as well