i tried to look up the part number for ordering, but their site is down. could anyone please provide me with the part numbers?

Not sure which one of their kits you're looking for, but here's a link that has a few kits and their part I.D. numbers.
http://www.modacar.com/bolt-on/catalog/Honda_Element_Big_Brake_Kits-23205-1.html

The site that Eww-an E has the part numbers, but what kit do you want?
They have three different kits for the front.
They only have on kit for the rear.

Here is the link to their PDF file with all the specs:

http://www.rotora.com/catalog/Rotora%20APP_10.1.pdf

It is a HUGE file for a PDF, it will take a bit for it to show up. It is a 16.1MB file, so be patient.