There is a "European (KMH & L/100Kms) Version" of what I think you actually want ie. a functioning oil temp around the rev counter (Item SCM46INSTB).
The "Speedofix" ones are m-style with a DUMMY oil temp range indicator, which are actually made by the "Lockwood Dials" as a "Special order".
Apart from the fact that the kit is jolly expensive and in the wrong denomination (PLUS!! the speedo has that cack writing over it). I was trying to work out if it would be possible to Marry the UK dial card with the German kit, But do not believe it would be worth it.