Frankly, striving to get the right number on the tail is nice, but it's a small detail when you have confirmation on all the other details being correct. IMO I say it's not wrong to skin Powerhouse using the tail code for Dutch.
You're getting a similar plane at the same time and same place, and you've done your best to get all the details right. If that one number is the ONLY thing keeping people from making the skin, I am of the much-though-out opinion (I have debated this internally several times before and always come out with the same answer) that the tail code just has to look right. 99% of people won't know it's wrong, and those that do probably have read this thread and will understand. It's not like you're picking random numbers for it. You're taking the number from one of the other planes it flew with.