yes - look at any high-quality family bible.& in there you should find a marriage certificate, a place for children's names, etc.
that's all you need.
now, if you are not christian, or not religious, still look, but use it as a template for your own use.
basically, all you need [i think]&is the title ("Marriage Certificate"), the two being married, the date, time & place, the name of the pastor/public official [you may not be able to get by with a&"common-law"&certificate via a public official]&(an affidavit for him/her wouldn't hurt either), and two witnesses (names & addresses at the time).& signatures for everyone involved, etc.
that should do it.
you may also want to check with johnny liberty's group:&
http://www.sorce190.com i think they have a fancily done one.
jon