Hi @Poppo
I seem to remember you telling us that you purchased a Low C harmonica (Lee Oskar, as I recall). If so, then you can use it in the version of Precious Lord, Take My Hand that I found and, since it is a Low C harp, you do not play the -3" (an A) in that low octave, but rather in the high octave that A is now -6. In fact, there are no bends at all unless you wish to add them for more emotion when playing.
I have written out the score I found and tabbed it for your Low C harp.
Feel free to download this picture and print it out. If you have trouble downloading it, then send me a private message with your E-mail address and I will send you the picture as an attachment that can be printed.
Regards,
– Slim 