http://www.lencarta.com/lighting-store/studio-lighting-kit You could start your search here.
Do you have a (spare) tripod?
the swivel bracket that holds the umbrella and flash has a screw thread so you can use the mounting plate from your tripod instead of a light stand. I've also found tripods to be more stable and flexible in their positioning, (adjustable legs.)
If you're outside remember to add extra weight to the base to keep it stable; Umbrellas catch the wind easily.
http://www.lencarta.com/lighting-store/strobists
http://www.lencarta.com/lighting-store/umbrellas
http://www.lencarta.com/lighting-store/general-purpose-lighting-stands
There are the links to all the bits you may need, and no I don't work for Lencarta![]()