Hollander Interchange is the source of the "Parts Lists" you see advertised on eBay for $10 or so for a specific car section and around $75 for an entire (very thick) volume. The primary market for Hollander Interchange is junkyards. According to Hollander, only a handle of parts interchange with the Datsun 1200. Also, they don't list very many types of parts but only a few most common types.
According to Hollander, only a few parts like the alternator and starter interchange with other Datsuns. You'll find much more useful information here in our Club Wiki.
See
* Cylinder_Head_Part_Numbers#Hollander_Interchange