Just to be clear, a Workhorse 5 ballast will do up to two 54 watt (48" HO bulbs). A Workhorse 7 ballast will do either four 54 watt (48" HO bulbs) or two 80 watt (60" HO bulbs).
Make sure the Workhorse 3 will run the bulbs (total wattage) that you are trying to run. Let me know if you have any specific questions regarding Workhorse ballasts or how to wire them up.
The best reflector is from Sunlight Supply. They do not sell to the general public.
I am a retailer/reseller and my retro kits use Workhorse ballasts, Sunlight Supply reflectors, CoralVue T-5 HO bulbs (of your choice), CoralVue standoffs and waterproof endcaps.
You can also use the Icecap 660 ballast to run the T-5 bulbs as well. If you are interested in getting everything except for the ballast, let me know and I will work out something for you.
135 gallon reef and 29 gallon mini-reef.