tips on local shops / options for a USB dynamo charger for my SON hub?

[Scott D]

Hi randos-

Does anyone have any recommendations for local (Seattle area) shops that'd be knowledgeable about dynamos and adding a USB charging device to my hub+light set-up? I could probably eventually figure it out but would rather pay somebody more capable at this point. I've been putting it off a couple years now because using a USB battery is generally a fine workaround when I need it.

A little more context:

I've got dynamo hubs (SON) and edelux headlights on two bikes and my goal is to add a low profile device that I can use to charge a power bank stashed in my handlebar bag.  (I know the new $ON Ladelux light accomplishes what I'm after, and the beacon light w/USB port can, but my budget's more modest). Ideally I'd find one device to switch between bikes when needed, or I'll have to get one for each bike if it's not a simple plug/unplug situation.

I'm thinking something like what kLite makes or sinewave's revolution - ideally something low profile I can keep in my handlebar bag or ziptie somewhere out of the way.  

Thanks in advance for any shop recommendations or device tips that have worked for you.

-Scott