I have searched till I am blue in the whatsit for a retail supply
store for the news(ish) buck-boost LED drivers (eg: LTC3453 -
Synchronous Buck-Boost High Power White LED Driver
), which look like the duck's nuts for setting up LED lamps, torches
etc.

I have seen a hundred articles about them, and prices per thousand
etc...but have seen not one site that retailed them.

I live in Australia, but if US store willsell to me, that's no biggy.

Thanks for any help