Will these pads fit?
 

http://pricepoint.com/detail/11111-0...Brake-Pads.htm

Will these pads fit on some 9-speed 105 brakes?

Those are cartridge pads that slide into a pad holder. They should work if your 105's have the original pads. Here's what the complete assemby looks like.
http://aebike.com/page.cfm?PageID=30...ils&sku=BR1338

P.S. Your brakes dont care how may gears you have.

I still have the pad holders. I was wondering if the holders themselves were different sizes for Ultegra/Dura Ace vs. 105 or 9 speed vs. 10 speed. I didn't think they would be, but you never know. They could squeeze some more money out of the upgrade lovers that way.