Hi Wrenchless,
What you find in fuses depends not only on what store, but also your geographic location.
I have gone through the same thing you are doing right now. I live in Phoenix, AZ, and I could not find the right fuses anywhere........ NAPA, AutoZone, Radio Shack, etc., etc.
If push comes to shove, checkout this link online.... they had all the fuses.... the right amps and the correct lengths, for my 750 K4 it is one inch.
http://www.newark.com/NewarkWebCommerce/newark/en_US/endecaSearch/searchPage2.jsp?N=1000018
Good luck,
~ ~ ~ jaknight ~ ~ ~