JediMaster2303 :
I have a Bitfenix Shnobi XL. So there is nothing less than $200
Not really. There are some 120mm ones for $200, but I wouldn't recommend them.
What you should do, is buy the Swiftech H320 if you still want something similar to custom loop.
http://www.ncix.com/detail/swiftech-h320-quiet-power-plug-and-play-b6-86340.htm
It is made by one of the best custom liquid cooling company out there, it has a triple/360mm radiator, it features Swiftech custom loop fluid inside, and can be expanded later. In a way, it is a custom loop pre-assembled. You get extremely similar performance to custom loops. It is also under you budget, so you money left if you change the tubing color (any 5/8 tubing), along with adding your own fluid (if you want a custom colored one). The radiator has a build in resevoir so filling it up and emptying it is very easy.