Stop looking for Neopan 400. Not only is it not like Acros but as mentioned in 120 it's discontinued. I'd also mention Tmax 400 as perhaps somewhat close to Acros but not knowing exactly what about Acros you like you'll gave to test/experiment to see what you think. But do not try too hard as likely it will never match what you like in Acros. So use Acros with a faster lens or a tripod instead. Acros is a lot like Acros, perhaps more so than any other film. ;-)
"Well, my photos are actually much better than they look..."
THank you everyone for the excellent advice. I will go out hunting for a few rolls of TMAX400 for a start and then see what else I will find.
@Drew: I have to admit that I do not know half as much as I would like to and I guess I had to google 50% of your answer Thank you and you definitely showed me a good direction to look into and I will have to do some reading to fully understand the differences between the different film types. Would you have a recommended read on this topic?
There are always two people in every picture: the photographer and the viewer.
~ Ansel Adams
Orthopan films are unusual, and I'm aware of only a couple of them being currently made. They are neither fully panchromatic past a medium-red sensitivity, nor are they truly ortho (red-blind), but somewhere inbetween. This gives them a more natural look for certain subjects, especially for foliage,
and also for some portrait conditions. The other huge distinction of ACROS is that it is almost immune
from reciprocity failure at long exposures, and is a wonderful choice for low-light or night conditions
because the exposure timing is so predictable.