His, and many other "exceptional" singers renditions of famous pop and rock classics can be found on the "Golden Throats" series of albums  which were released by Rhino Records between 1998 and 1997. Four in total. My personal favourite was the final release, "Celebrities Butcher The Beatles"

 I interviewed Bill Shatner at a store grand opening in 1975 while he was doing promotional work for Loblaws.

Here's a little known fact...

Bill lent his name to a massively unsuccessful line of women's underwear

The brand name?  

Shatner Panties