* Search online retailers. Amazon, eBay, and other online retailers sell accompaniment CDs for a variety of songs, including the Masters Call by Marty Robbins.
* Check your local music store. Some music stores carry accompaniment CDs for popular songs.
* Ask your local librarian. Some libraries have a collection of accompaniment CDs that you can borrow for free.
* Download an accompaniment CD from the internet. There are a few websites that offer free downloads of accompaniment CDs, including the Masters Call by Marty Robbins.
Once you have obtained an accompaniment CD, you can use it to practice singing or playing the Masters Call by Marty Robbins. You can also use the CD as a backing track for live performances.