Last skimmer question

[DetectiveTofu]

I have a CPR BAK-PAK HOB skimmer; I swapped out the stock RIO pump, and replaced it with a MJ1200 pump. I am seeking a preskimmer box that will accommodate the MJ1200.
Which should I purchase?

http://amekaaquatics.com/search.html?productcategory_id=17 (the second down from the stop)

or

http://www.marinedepot.com/md_viewItem.asp?idproduct=AC3323