Will a standard MacBook Pro optical-bay HDD caddy fit a non-unibody MacBook Pro? I have an early 2008 A1226 15" MacBook Pro Santa Rosa (ie non-unibody), and I want to put an HDD in the optical bay (replacing my original HDD with an SSD). There are caddies like this that might do the trick, but they never specify my older (non-unibody) MacBook Pro version exactly. I'm wondering if that will actually fit, or if there's a better alternative that's fairly cheap. Optibay sells one specifically for non-unibody here but at $100 it's 5x the price.
The optical drive in a non-unibody MacBook Pro uses a PATA interface, so you would need to go with the MCE or iFixit caddy, both of which use an interconnect board to convert from SATA on the HD side to PATA on the logic board side. 

The caddy on Amazon needs a SATA connection on the logic board side, so it will only work in a unibody MacBook Pro.