The University of New Mexico contests the indoor 400 Hurdles each home meet. We have found it to be a real crowd pleaser. As we host the USA Indoor Championships and are allowed to place two exhibition events in the schedule I am thinking about putting that in as I am meet director. Really a lot of fun for the athletes. I put video up on youtube of our races last year.
Given that you seek competition in Europe, I suggest you look into the "Botnia Indoor Games" in mid-February at Korsholm [near Vaasa] in Finland. In recent years that meet, on a 400-meter indoor track, included indoor steeplechase with water jump.
In my contacts with meet director Joakim Traskelin I gathered that he seems willing to experiment with different events.