You do not say if the lamp holder is a pendant dangling from the ceiling - a solid fixture screwed to the wall - a table lamp or a standard lamp.
You might consider safely removing the lamp holder from where it is (with the power isolated from it of course) and taking it to a store to buy a replacement.
You will need as a minimum a small screwdriver to undo the terminal screws for the two wires - you may also need other tools depending on the type of holder.
You might also consider asking an old retired gentlemen to do it for you for the price of a couple of beers - or even a professional electrician for the price of a meal out for two.
Good luck
An old retired gentleman, October 2009