What you really need is to have a shipping address of a friend in the USA who lives right next to the US/CAN border, who also happens to own a large Trebuchet.
Then he could literally just fling them over the border, and you could catch the high-velocity incoming "projectile". Talk about "express air" delivery... Medieval era "high tech" sometimes has a higher purpose than simply storming castles...
package from the US with wires gives them looks on their faces like the cat gets when the vacuum cleaner gets turned on)
Or the nervousness that a snake would experience, when trying to cross a large room, at a rocking chair convention ;-)
I can imagine the massive panic that could be created, if one were to ship a wound-up alarm clock over the border. tick tick tick...
FWIW, just to attempt to bring this topic somewhat back on-topic, the 6GU7 (and 8GU7) is the 6V (or 8V) filament near-equivalents of a 12BH7A.
The 'GU7s are currently still considered to be in the "plinker class" category, but that could rapidly change, once AES starts getting large numbers of orders for these tubes. 8^/
/ed B