Can anyone help me to find sheet music for some of the songs that Jackie Chan (NOT Jacky Cheung) sings?

Specifically I am looking for the following:
"Zhen De, Yong Le Xin" (Truly, With All My Heart),
"Ying Hung Gu Si"(Hero Story from Police Story I),
"Shigatsu Ninareba" (When April Comes),
"Chao Qi Chao Luo, Pei Ne Du Guo" (Keep Your Company through Every Moment), and
"Ni Shi Yi Chang Duo Quin De Meng" (You Are a Lover in My Dream).

I live in the US and have not been able to find sheet music for any of Jackie`s stuff... If anyone can help or give suggestions, I would be most grateful.

Shinyuu