Flushing AC lines....something special?

I know Im to us special compressor oil in the prius but what do I use to flush the AC lines?
I desided to replaces everything in the AC system, its full of oil and old compressor bits..

Being the car is 9 yrs old with almost 200,000 miles I cant see paying a shop to do the job or spending over $900 on toyota parts so I went with after market parts for a total of $120, then a used compressor with 6 month warentee from ebay should be around 150, the odd thing is the new $700 one from toyota only has a 90 warentee if they dont install it.

please post the flush product I need and where to get it, thanks