Strangely, I've been looking for those "filament" style lamps here in the USA and I have not seen any yet.
As far as driving those filaments, would a VFD driver like the MAX6291 be of any use? It seems the voltages are similar.
They might not be available in NA (at least not through official channels) due to not meeting safety requirements: no fuse, no resistor to limit current if the diode bridge shorts out, possibly nasty stuff if the current-limiting capacitor shorts out too and likely more.
As for the driving, as Mike said, you could probably drive those using regular 5V TTL chips by tweaking the supply voltage since most of the voltage gets dropped across the LED string: simply set your supply voltage to NxVF
+ 3V, then set RS
allowing 0.3V VCEsat
on TTL outputs, this way the outputs should not get pulled much beyond VCC