You probably won't find one. In my experience, even the terminals that terminal-emulators are emulating rendered tabs into spaces on display. Certainly you could set tab stops on VT100s, so it was not a hard bound definition of what a tab was on the screen. If you sent the escape sequence to print screen on a real Digital Equipment Corporation VT100, it would send spaces to the printer where tabs had been rendered as spaces.
As an alternate solution, consider opening your tabbed source document in a separate session of your GUI editor. Then select your required text, cut and paste into your target document that you have open in a different session. For instance, I know gvim will copy tab characters into the clipboard.
Whether your particular GUI editor supports it is just a matter of conjecture at this point.