Hi Andrew C,
Sorry to hear that the 2 mail order zebras were DOA, that's a real shame.
I would have suggested Trimar as they do mail order but they don't have any zebras and are unlikely to get any. Your best bet is going to be to check Uk classifieds regularly for any that come up as private sales, only problem is they are likely to be sold on a collection only basis.
I checked with wild woods today they have 7 zebras left that are priced at £125 each. They have another 10(German wild caught?) that are currently in quarantine, these will be priced at £165

. I spoke at length with the fish sales manager, Keith, about the future availability of zebras. He said that there will be no more exports from Brazil. However he has managed to get a German supplier who will be able to supply him fairly regularly, however the prices are much higher. He stated that his next batch from Germany are likely to be around the £200 mark
I querried the German origin of the fish and asked if they were F1s but Keith said that they were definately wild caught

Apparently some German suppliers have been stock piling zebras over the last 2 years as they anticipated the ban. Another twist in the zebra saga, make of it what you want I don't know what is fact and rumour anymore.