Hi David,
There are a few options which would be great for your system.
The Sea & Sea YS-01 and Inon S-2000 are the two most popular compacts strobes. Both would work perfectly with your housing.
The more advanced YS-D2 is also a very popular strobe.
To trigger the strobes you will need a fiber optic cable such as this one:
http://www.housingcamera.com/id2774-sea-and-sea-50128.html
A cable is included in most of our packages.
The WP-DC52 comes with a small black adapter for fiber optic cables.
If you have misplaced it, you can also use the Sea & Sea mask set to create a connector on the housing and block the internal flash.
Read our Ultimate Strobe Guide for more info.
