@bl00, I did check the trap... I'm not absolutely sure they went down, they might have been left in the trash bag that had the left over oven cleaner in it and thrown away.
I'm really anxious to start using this vise! Anyways, outlaw, ajchien, & mike: your comments have me thinking in the right direction! I actually found this post that does the same thing (though in a much more sophisticated way) with a hex head bolt.
http://www.garagejournal.com/forum/showthread.php?t=78885
These look a LOT like the screws I need... They had a very similar angle.
Also while doing some research I found these:
http://www.viseparts.com/product_p/ba-11106s39.htm
So I may just give them a call on Monday to see if they also carry 1/4" ones, as my vise uses 1/4" instead of 5/16".
At the same time though, it may also be fun to mess around and make my own solution, I mean it seems easy enough to chuck a bolt, use a grinder to approximate the angle, and cut the bolt to length, right? Also it looks like shipping is pretty expensive at about $12 for a few screws... Doesn't seem worth it unless I can get them to just send it first class for $1 or $2...