Lostmind, actually, I need both the normal PCI riser and the PCI extender. My Silverstone case comes already with the PCI riser that you are referring to. But since I am using a smaller mini-itx board, the PCI slot ends up being lower than if I installed an ATX board and so I need to extend the PCI slot up with the PCI extender.
PCI extenders are not very common right now which is why I'm having a heck of a time finding them locally for under $45 which is what NewType in Yaletown wants for them. Mailordering it from Caseoutlet would be $5US plus shipping.