Where do I find a comprehensive list of ratings on Preferred Stocks

After some research, I found a publicly available site that has
excellent stock analyst recommendation listings.  The rest of the
sites I found all used the data off of this site.  Anyway, the site is
zacks investment research:
http://my.zacks.com/
Enter the stock symbol you are interested in the enter ticker box, and
then select "estimates" from the drop down box.  Or, alternately, take
this url:
http://my.zacks.com/estimates.php3?tick=MSFT
and replace the MSFT with whatever ticker symbol you want.  That gets
you just about anything.  A comprehensive list of every stock with
every recommendation would probably consist of several thousand pages
of text, thus making it as difficult to search as this website :P  I
hope this helps!

Search strategy:  Looked up "anaylst ratings" on google, checked out
several sites (quicken, msn finance, and a few others), and all
mentioned that they got their analyst information from zacks.com. 
Zacks also has detailed information on stockbrokers, which is
different than the usual sites attention on the stocks.

jzig-ga

The site recommended does not have information preferred stocks at
all.  I found a site on my own called www.quantumonline.com however,
the site does not have credit ratings which are essential.  Scottrade
has the information but evidently it is not updated at all and you
have to be a client to get the information.  Zacks if fine for
ordinary common stocks but not for preferred stocks which are more
like bonds.  GWE