My husband wants me to find a woman to have sex ...

Hi,
The more important questions are: Do you like that idea or you do it just because your husband wants it ?  Are you aware of the potential dangers and implications in having such relations ?  Are you aware that by asking it from you he shows disrespect ?  Would he agree to join another male if you asked for it ?  If it's not your free will better don't agree and don't accept it !.
Best regards,

But if you are into it, one of the best ways would be to go to strip clubs with him.  A large percentage of strippers are lesbian or bi.  Have a couple of lap dances and get to know them.  That may be enough to satisfy your husband.  If not and you want to go further, you're on your own.

I don't think the strip club is the way to go, a lap dance is not really having sex with another woman, plus, I'm not sure that going pro is the right thing for the two of you.

As Oron said, first of all you have to be 100% sure that this is something both you and your husbands wants, a lot of couple goes into the 3way thing without understanding that this might have a serious effect on their relationship. If you are going to go for it, make sure both of you feel comfortable in stopping it at any given moment because you aren't feeling well with what's going on.

Also, make sure that you are doing this because you want to and not  just to please him, being forced to a sexual act without wanting it is basically rape and the effect on the relationship can be especially devastating if you feel like you are being pushed into it by him.

here are a few websites were you can look for another woman to join in:

alt 

Nerve

adultfreindfinder 

or you can just run a personal ad on Craigslist  

Try craigslist... specific to your area or the nearest big city...

Why you are encouraging  the idea of your man to have sex with other woman? very bad , especially after marriage.