It is not all that jazz ..... and bad out there!
If a credible consortium of European EAZA aligned zoos where to invest in a coop echidna management and breeding plan, echidnas would be forthcoming from the ARAZPA region.
Just have a look f.i. at the wombat arrangements where zoos interested in and having experience of an Antipodes themed mega exhibit (Duisburg, Planckendael et cetera) have been able to import new founders from Australia. Similar plans exist for Tassie devils at selected establishments. Various zoos have had long term success at maintaining echidnas, including Zoo Frankfurt, Blijdorp, Rotterdam and Planckendael.
Incidentally, it would be nice to set up colonies of the rarest Tachyglossus aculeatus ssp. in Australia itself. At present most colonies consist of T. a. aculeatus only?
On another note: why do some zoos maintain a singleton of a rarely kept ssp. (like LA and St. Louis Zoos)? These Kangaroo island echidnas would be better off at the Adelaide Zoo (where a singleton male is kept)!
On even another note: why do some zoos maintain non defined echidnas whereas all have been wild-caught and should have been forthcoming with explicit consent from the Australian government ...?