Vostro 3500 Interposer

Hello,

I own a Vostro 3500 but it's missing the Hard drive Interposer, now these are almost impossible to find for my specific model, therefore i'd like to ask if there's any alternative from a different model which will fit?

Here is an image of the Interposer for the Vostro 3500:http://i.pchub.com/i/Dell-Vostro-3500-HDD-Caddy-Adapter-b-73094.jpg

Cheers.