We need a little more info here. Is the tang of the knife completely hidden?
If so then it's a matter of measuring the thickness and width of the tang and cutting a hole in a piece of brass, nickle or steel that size. You do this by drilling a few holes, cut the web between the holes with a jewlers saw. and use some small files to file the hole to the correct thickness and width. This is the lowest tech least amount of tooling method.
I don't have a site and don't know how to put a link to it even if I did so I sent you an email with a copy of a message I sent to a mate grading chain drilling a slot in metal. It may sound a bit strange because I did not edit it to
exactly what you wanted but it may be helpfull.
If you see a message from Reg ellery in your inbox it is me not a scame to sell you viagra or computer software or steel your banking details.
I posted here because I delete unknown names in my inbox.
There are many tutorials on www.knifehow.com . Check in the "KNIVES" section.(The site has been acting up a bit lately,Pakaramen is trying to fix it.)
There is all the info you will need to make a knife on that site.