Yeah, original US comics are pretty easy to pick up, especially in the Netherlands, where they only produce a handful of Dutch translations. Most major cities have a least one outlet for the original US editions and Amsterdam has 4 or 5. There are also plenty of outlets in Germany for the originals but they're somewhat scarcer in e.g. France and Spain, where they translate a lot into their own languages.

It wasn't always so, however.
When I first moved to Europe in the 70s, the only English-language editions of American comics, which were available on the news-stands were Batman and Superman. They weren't my cup of tea back then because I was a devout Marvelite. I almost went cold turky for something like 18 months, only sustained by my collection of back-issues until I found a store in Aachen (Germany), which had a small selection of US comics. I used to make a monthly 30-km trek across the border from Maastricht (the Netherlands) to Aachen on a rattling moped to pick up my regular fix; seven Marvel titles; FF, Avengers, Captain America, Thor, the Hulk, Ironman and MoKF. I was so starved for comics, that sometimes I couldn't wait and made the trip a week earlier, in the vain hope that the new comics would've arrived. Ah, the crazy lil' things we do for love...

So far I have been delightfully surprised by the contents of the World's Finest Dollar Comics, much better than the Detective Comics Dollar Comics I have, and they're pretty good.

Apparently Don Newton was producing quite a bit of work at the time; an issue of Batman a month + Shazam and sundry other jobs. Not only great but prolific too.