An alternative to the Schneider 180 macro is a 180mm Rodenstock Apo-Macro Sironar f5.6, filter 67mm. You can't go wrong with either.
A very cheap tool I learned about in school is a strong stand to hold reflectors, back drop or lights if you decide to fill. Use a two pound coffee tin. Fill with mixed Sakrete cement. Clamp a 1"x2"x6' piece of wood centered in the mix for a few hours. Paint flat black if needed and you have a very good stand for little money. Pick up spring clamps at the hardware store to hold objects to the stand.