You should have hung on to that D600.

There's a sale over at action-led-lights.com right now. The seller is the largest MS dealer in the US now, and the only US Gemini seller, he's a decent fellow and stands behind his warranty (1 yr on all gemini, 1yr-heads / 6mo-batteries on MS). He sells at ebay too for going on 3 yrs now, here. Prices are better at his website, he's got 2 or 3 good headlights for ~$100 or less. The "std" MS 808E XML package is $75 shipped. More than the 50 you specified but most everything below this price point is junk.

The Cygo-lite Expilion line is decent for a no-external-battery type light. A 350 costs about the same (or more) as a MS 808E but only about half as much light.