Hi, I'd suggest to type in Dutch 'e-mails voorbeelden' in Google, plus the subject of the e-mails you'd like to write. For example for emails for an accountant, type in 'mails voorbeelden boekhouder'
Hm I just checked the German Amazon and it should be available on www.amazon.de/common-language-errors-English-speakers/dp/1686564996/ref=sr_1_1?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=learn+dutch+errors&qid=1589722641&s=books&sr=1-1 Thanks in advance for buying!