AFAIK it is not very cold hardy, I got two cuttings from the DBG at one point, one grew in full sun, but got some weird rot going on, so I removed all but a independently rooted set of about 3 pads. The other one is growing in more shade. It would take the sun OK, but always have a bunch of pretty badly sunburnt pads.
I have a large number of cuttings just sitting being cuttings. Not sure about shipping plants internationally, I have heard that is pretty hard to do from the US, but certainly willing to ship some cuttings within the US. They have been sitting around for at least 4 months though so no guarantee how easily they will root (my bet is still pretty easily).
What makes it an extra cool plant is, that it does this in the winter: