First of all, this web site is not for third party aircraft support.
That being said, I haven't downloaded the zibo B738, but it's possible that there is no livery difference between the default B738 and the one modified by zibo.
I have found no EL AL livery for any of these 2 aircraft.
If you want to make one yourself, it is a very hard work that can be done with either photoshop or gimp. Check if you can find a paint kit for this aircfart, it will make your work easier.
All the best to you.