[Q][AOSP] build like stock based on AOSP topic

Hi,
I want to build AOSP including google apps/services to make a similar factory image as possible as.
First time, I just build a AOSP with sevral google apps but It's very insufficient.
(code.google.com/p/aosp4nexus5/wiki/AOSPforNexus5)

I can see some error logs because of missing libraries, apks.
and I found that many proprietary blobs are not founded on AOSP.
Maybe I can porting it one by one manually , but it seems very annoying work...

I just want to build AOSP with google apps for nexus 5 5.0.1.
I'm a noob and worry about my silly question.
Are there any easy way for it?
Also very little tweaked custum rom should helped me.

Thank you.