How to do history expansion on a string?

vapnik spaknik <[email protected]>
Newsgroups gmane.comp.shells.zsh.devel,gmane.comp.shells.zsh.user
Message-ID <[email protected]> 
Is it possible to expand a bang pattern stored in a string? (e.g. "!123:2").
If so how? I've tried the zpty and zsocket modules to no avail.
I want to make a convenience function for selecting bangs using fzf so I don't have to look up the syntax when I occasionally use them (I've already made one for globs & one for parameter expansions).

Regards,
Joe Bloggs.
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