Many rural Alaska districts have a culture camp opportunity for new teachers, which will both introduce you to the culture of the community in which you will be serving, and in most cases is also a college course which fulfills the Multicultural Studies requirement (there will be some reading and assignments to complete). You can also access the two courses available through the Alaska Staff Development Network (ASDN) once you are hired - these are about $400-$500 apiece. They are through Alaska Pacific University, are self-paced (but must be completed within a year's time) and are distance learning.
So basically, if you have everything you need to become certified in Alaska EXCEPT these two courses, I would not worry overly much about completing these two courses. There are a lot of ways to meet these requirements within the state - most districts have some sort of pathway or assistance for teachers from outside of AK to meet these requirements. If you are desirous of fulfilling all the requirements and receiving a standard certificate prior to applying for positions, ASDN is your best bet - it will be a little more expensive if you are not yet an employee of an Alaska district, but still much less than $3-4K. The website is
www.asdn.org - you can download the current catalog and look for the classes which state they fulfill the Alaska Studies or the Multicultural requirements for state certification.