Thanks for the welcome E1320, and the long post to my problem.
The Solarforce dropin looks quite nice, and I am seriously considering buying that, but I already have a spare drop-in(actually it's the XM-L dropin from deal-extreme you are linking to), and I just need a driver that does boost(compared to the buck-driver already installed in the plugin). Do you know which driver the Solarforce use? It's something like that I need, except I would't mind if it was driven a bit higher.
I fell over a few boost drivers on DX, but somehow the quality just doesn't seem very appealing.
http://www.dealextreme.com/p/25505
~700mA output judging from DX comments. Looks to be moddable by changing components, but efficiency drops quite a bit.
http://www.dealextreme.com/p/15880
Quite nice specifications, even though I'd prefer a higher output. DX comments are mixed in regards to output and efficiency.
http://www.dealextreme.com/p/4735
Pretty cheap, but comments talk of output currents around ~350-600mA.
All the boost converters on DX seem to have pretty low outputs and horrible efficiencies. Is this normal for boost converters, or just the DX batches? If I don't remember entirely wrong, the last time I made a boost converter in school(studying to be an EE) it had an efficiency around 85-90%. Of course, that was using components that would never even remotely fit in a flashlight.
Edit:
I fell over this review: https://budgetlightforum.com/t/-/232 and it surely looks like something I could use for my flashlight, even though more current wouldn't hurt. Well, that and the fact that it isn't in stock.