Anyone from the US care to comment?
Why, certainly, at your service.
The answer is....
Flight Planning and Flight Support Services by Universal Weather and Aviation, Inc.
These folks do it all for you...all you have to do is pay their fee, which, all things considered, is quite reasonable.
IE: quality is remembered long after price is forgotten.
PS:
These folks were, at one time, Universal Airlines, one of the original 13 US supplemental air carriers...and they know their business, without a doubt.
Have I personally used 'em before?
Only for at least thirty years.