version of outlook?

There may be other options, depending on his version of outlook, but he can
either send you copies of his contacts to be printed or make a view with the
fields you need and copy and paste it into a document for use in mail merge.

One approach would be for him to create a new PST, copy his contacts folder
to it, close it in Outlook, stop and restart Outlook, and mail the PST to
you.  It may be necessary for him to rename the extension from ".pst" ro
something else, like ".psn" in order to mail it.  When you receive it, save
it do disk, rename it to ".pst" and then, in Outlook, click
File>Open>Outlook Data File, browse to the file, select it, and click OK.
You'll now have access to that contacts folder and can use it in a mail
merge.