UK are all TD05.. JDM are all TD05 except the Wagon which is TD04 as standard.
you MUST match the map/ecu to the turbo !
The new mappable daughter board is Designed / built but ESL and distributed through the usual places, myself included.
I expect prices to be £200~250 less than Apexi PowerFC.
The jap ecu you mention should be a Z4.. whcih does have a reasonable map in it and is okay on super unleaded but you are not talking a massive difference in power and will have the 112mph speed limiter on it.
Simon