Is building yourself not an option? I ask because that motor there is over 10k... You could build one yourself for a fraction of that. Also 440 source is a good site but not sure the offer a complete turn key engine.
Unfortunately not really an option to build it myself....
Cause I lack the knowledge and also then I still have to get all the parts from America. So I thought I would better look at a reliable supplier which can sell me a complete engine build to my liking.
I know the price is 'high' but the exchange-rate is very nice for Europeans at this time. :-)