solder? could you post a picture?
it's possible sometimes to take the plug apart and solder the wire directly to where it was once crimped in, but this requires a lot of messing around with little parts.
Hobby stores tend to have a better selection of small parts to fix these things than hardware stores (sometimes)
Home depot (if you are talking about your standard 4 pin compact florescent plug) may have something,
if you can't find little parts locally, google it .. you'd be surprised what you can find on ebay or some other parts website.. just look up 'compact fluorescent parts' or "snap in lamp socket fluorescent" etc.. but for here on the forum.. I think more pictures or better description of parts would help us help you.