If we want to combine enneagram and sociotype, for example, there is a slim chance to come across to a SLE with 127 or 359 tritype. SLEs would be more likely 358, 368> 458, 478. So your dual is probably 853, 835, 863, 836, 683, 638.
Besides all of this, I also like to observe the similarity even if people have very different socio types. For example 417 IEE and 147 LSI are very different in every aspect, but they are such an idealist, although they actualize their own idealism in different areas and ways. The main structure/skeleton is the same, it is truly like a work of art as you well put it.