Probably because BlitzCoder seems to be down. I've also got it on my personal site tho -- go here for an alternate download:
http://www.echthros.com/html/modules.php?op=modload&name=Downloads&file=index&req=viewsdownload&sid=6
Grab the 'slotted inventory library' and you're sorted.
http://www.echthros.com/html/modules.php?op=modload&name=Downloads&file=index&req=viewsdownload&sid=6
Grab the 'slotted inventory library' and you're sorted.