The Hasbro paints would work fairly well and you can pick up a complete Hasbro figure for $20 or less. The SS Bespin Han can be had for under $50 on ebay.
The UU pants are the only truly accurate Bespin pants until the HT Bespin Han comes out. I found them from a fellow boardie, so maybe post a WTB in the commerce section?
Also, I'd recommend cutting off the SSC jacket's zipper.
This is mine with the UU pants - unfortunately you can't see the side stripes, but the stripes are in proper scale unlike the Hasbro or SSC pants. The SSC pants are also a little off in terms of fabric color.