The only other small twin jet in this scale i can think of is the Matchbox Fiat F-91Y which aint that easy to find these days unless as a Japanes import.
Another possible source coulf be 1/100 twin jets (1/144 is probably a little too small for the job), however finding only the Hornet and Tornado may fit the mark as most other twin jets are the later split engine types or blended wing types.
Look forward to seeing how this build progresses Carlos
Geoff