When it comes to slide film, NOTHING gets you closer to the 'C41 look' than Astia. The look of E100G is MUCH more 'chrome-like' than Astia. So, if muted colors, low contrast, and high exposure latitude are what you are looking for, Astia is what you want.

As far as finding Ektachrome EPN 100, I actually think that even this film is more 'chrome-like' than Astia