try google then harley rakes. One of the listings was the following link,
www.absoluteinnovations.net/ landscape/toolcompareTR3 it had a comparison chart for other rock removing pieces of equipment. I have never heard of it.
If you can't buy harley rakes in europe or find one close enough to you, could you buy in the us or wherever and have it shipped?
And don't give up on the eliminator. Mayby a local bobcat dealer has one you can demo.