INPUT NEEDED- need new AC condenser.

[2toneNV]

Guys, I have had to replace the AC system on my Buick twice but both times it has been replaced after doing a vacuum test everything shows to be right. I had the engine/trans out and think I need to replace the condenser to avoid insufficient AC.
I have bought condensor's from O'Reilly and Advance in the past and they don' t seem to be close to the original configuration.

Any info on where to buy a as close to original replacement?

 

[SFI Cutlass]

If I was in the market I would buy from. http://www.highwaystars.net/ac-condenser-gm-acdelco-52485723/