And that do not cost $100? Would also be nice to have a copy of come by Namie Amuro. A legit one.

CDJapan is one reputable place to buy CDs, DVDs etc.
They seem to have Stand Alone Complex OST+ in stock (that 2011 reprint version, VTCL-60255)

But Amuro Namie - So Crazy / Come (MAXI Single) is sold out unless you want to use their Proxy Shopping service to get it or buy Style-album which also should have 'Come'-track (according to discogs database).

YesAsia is usually other good place to order CDs, DVDs etc. but both were sold out/out of print there.