I am still looking around because I would ideally like some spares in case of lightning damage.
I can fortunately just drop in a DLink DSL-320B-Z1 modem instead because they are exactly compatible since PPPoEoE is PPPoEoE and both speak MTU 1508, but I would still like to be able to carry replacements.
There are a few on ebay now at silly prices. Does anyone have any other buying tips?