Recently I found many hymms dedicated to Guru, created by Adi Shankaracharya. I have created a playlist. Direct Link
Lyrics can be found at http://www.hindupedia.com/en/Category:Stotra
Please Ctrl+f and find for 'guru' and you will find links to all the stotras.
Direct Links
Guru Paduka Stotram
Guru Stotram sung at Sivananda Ashram - Haridwar
Guru Ashtakam / Gurvashtakam
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I am also looking for the following songs. If anyone knows it, please can you give the link
Guru Stotram
Guru Paduka Panchakam
Aum
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