Yup.
http://www.strobesnmore.com/specials.htm?10
Nova and Whelen strobes are exactly the same. Nova started after the CEO of Whelen quit and started his own company. they are both backwards compatible (i had to replace a bulb with a nova bulb cause it was cheaper)
also. at the bottom of the page you can get kits with 4 bulbs.. but notice that the box supports 6 bulbs.. so get 2 extra bulbs and cables.
2 strobes in front
4 in rear