I'd look at the Coral Vue ballasts and lights. They are not as expensive as some of the others and they offer an electronic ballast. www.coralvue.com
If you want a ready made core/coil ballast, PFO has excellent equipment. You can, if you're handy with wiring, make your own using advance ballasts. You'll just have to wire them and provide an enclosure. You might check with Bearfan as he seems to know quite a bit about DIY MH
. Last time I checked, hellolights.com had a parabolic reflector/socket on sale at a great price. I don't remember exactly how much but I know it was less than I can get them from my wholesalers...that's cheap.