Heard of Nestorovics?

Any one aware of his products? SFL 2 preamplifiers being modified by him?
your input will be appreciated.
I am only aware of his speaker designs from the 70's.
He designed various products for a while. Some thought his various components worked best together but were flawed when mixed and matched. I have no personal experience with them. I guess I'm guilty of passing rumours. The mods are news to me.
If you contact Savant Audio, they might help you to get in touch with him, as i believe Savant is the only dealer that sell his new products.