What SSD models and brands can I get for my Late 2012 MBP (MacBookPro9.1) that Yosemite supports?
I personally can't tell you about SSD compatibility for MBP, but I went through the same process when I did a HD upgrade on my 2009 MBP. I found numerous reviews on sites like newegg, amazon, bestbuy and so on and many people said they used the drive to upgrade their MBP's. I ended up buying a HD from newegg that said it was for a MBP and it ended up not working for me. I then looked at OWC's HDs and bought an identical one on newegg with the same results. 

The one that I ordered from newegg was the following: WD Scorpio 750GB

The problems that I was having with the new HD's was that their connection would be intermittent. It would work for about a minute then everything would freeze for about 2 min then repeat. The HD itself was not failing because I tried it in an external enclosure attached to my mac and it work perfectly fine. The OS was not the problem and would install every time, but would take around 2 hours to install (normal install time was 30 min). 

I ended up ordering a new one from OWC and worked perfectly in my MBP. One thing I noticed about OWC's HD was that there was a different firmware loaded on them specifically designed for apple products. 

The specific HD from OWC is: HGST 750GB (OWC)

Hope this helps.