My 2008 Touran engine has just packed up - not ideal when you're just about to go on holiday with the family!

The timing chain appeared to have lost it's tension and has caused quite a bit of damage. It's only now that I discover that this is quite a common problem with this vehicle!

This variant of the Touran seems to be quite rare and I'm having a bit of trouble sourcing a replacement so I was wondering whether there were any other engines which are interchangeable with this one which are easier to source (whether VW/SEAT/SKODA etc.)?

Your help would be much appreciated!