A:
http://www.staples.com/Refills-for-uni-ball-Gel-RT-and-207-Retractable-Pens-Medium-Point/product_569753
If you're looking for a fine point, you'll probably need to look for a sort of importer. For some reason none of the companies think Americans want to write with anything smaller than .7mm pens.
Answered on 1/18/2011 by BerserkLeon from Butler, PA