I don't know exactly how desperate you are, but you can give this conversion kit a try from Apex Models, they are a good bunch in there!
http://www.apexmodels.com/gbu0-prodshow/ABS2310006.html
Unfortunately, you will need to purchase the whole kit, which includes, battery tray, pinion, screws, etc, etc. You can use them as spares I suppose! The motor mount supplied looks very similar to the Ansmann Hyper Brushless conversion kits one that use to be very readily available.
Here is a picture of the kit and motor mount
Your only other options are either importing from the states or waiting for stock of just the motor mounts to come back in, whenever that may be!
Hope this helps anyhow!