Have a look at AP site advertisers
ProTog,
Fotogenic, Hypop, JJCPhotography who all specialise in well priced studio gear.
I agree with Tony, perhaps look at reflectors, and using speedlights, with brollys rather than a full lighting kit. There are some reasonable, cheap lighting kits out there these days, but read the menu, they are usually low output (light level) and getting replacement globes etc can be frustrating, if not impossible, unless they are generic and can take some of the better known brand bulbs.
If you do want to go beyond single light portraiture, a kit with 2-3 lights is good. Use them as one for main light, second for side highlights and third for hair spots (get a snoot). Really you can make up quite a good lighting kit for much less $$ than you could even 4-5 years ago.
Also look at expandability, some kits, come as-is, and there is not scope to add things, like using wireless triggers, etc as they don't have the connection sockets. They are built as a single kit, and that is all, this is more the cheaper options out there.