Sorry for posting in English but I am abroad. I suggest that if you want to use your flash soon, you send it to Ikelite service yourself. Contact them and talk or address your email to Duane Brigham at:
duane@ikelite.com
Ikelite Repair Department
50 West 33 Street
P.O. Box 88100
Indianapolis, IN 46208 USA
repair@ikelite.com
You can find the telephone numbers at their site. If you can, send a couple of the photos of the damage as well, but they will likely ask that you send the unit to them.
Turnaround will be a couple of weeks, if it can be fixed, and they will inform you of the costs (from what i understand you are not covered by warranty) in advance.
The guys are very helpful and prompt.
Sorry about the accident!
Babis