Pasting multiple glyphs into one glyph

Lets say I have 10 different glyphs and I want to edit them at the same time and create something new as a separate glyph. Is there any way to transfer the glyphs into a glyph cell?

Without a script, can only think of a series of selecting the source glyphs, copy, selecting the target glyph, and Edit > Paste Special (Cmd-Opt-V)

You could duplicate them?

@mekkablue As far as I can see paste special only puts one glyph into the new glyph, not all of them.

@GeorgSeifert Yes but I want to edit them as one glyph. It is like creating new contextual alternates based on current glyphs.

Yes, that is why I wrote “series of…”.