Is it possible to buy larger injectors for the older zetec with side fed injectors?

AFAIK the older ones have a side fed version, whereas the newer ones (definetely Focus) have a top fed one (more common normal I think).

My current injector looks like this:


And I think that the newer ones will look something like this:
or this

If not, do anyone know if it is possible to retrofit a top fed injector rail from a newer engine?

thx

Ibsen


'97 mkII 1.8 sedan, mtx, Diamond White, Magnecor KV85, clear side repeaters