Create Yosemite install disk on a Windows machine
It is not possible without access to an OSX machine. If you have the old disk from your Mac it might have the recovery partition on it. If you can put it back in, boot while holding down command-R. You can put the SSD in an external enclosure and use the recovery partition to install Yosemite on to it.

Maybe if you go to an Apple Store and ask nicely they will let you install Yosemite onto the SSD? Or at least get the installer onto a USB stick.