I'm sorry I don't have links to bass tablature for you, but I can offer you some advice - I've played the piano for 11 years, bass for 3.
I'd suggest ear training - google it, http://www.good-ear.com/servlet/EarTrainer is a first-page link that looks helpful, there is an app for it, ect. If you learn intervals and can play around to find the first note you should have no problem you should be ready to make your own tablature.
http://www.power-tab.net/products.php This is a free tablature program for making your own tabs, I don't have a lot of experience using it but my friend does and it works pretty well!
On a side note: Ask your pastor/worship leader/ect. if they have access to CCLI - http://www.ccli.com/ it is the licensing group for a plethora of christian artists. They have lead sheets hymn sheets and CHORD SHEETS if you use them to play.
I really hope this helps, maybe a little bit! I'm sorry I do not have any links to tabs or videos/covers - I'm more of a pianist when it comes to christian music.