I understand completely, you seem like a really decent stand up guy, live not too far away, and if you needed some welding done, I thought I would offer, that is all. I completely understand specific needs!
I need a rock and root rake myself, but I am going in a different direction. I clear a lot of land from forest into fields, both on my own farm as well as for others on a contracting basis (it was 100% accidental I assure you). So I am looking at building a pull-behind rotary rock and root rake. Again, I am not saying anyone else should go with one of these, but after a lot of thought, realize this is just what I need.
After this winters logging, where a corner of one of my fields was used for a log landing, it is covered with sticks and brush...far too many to move by hand. So I think this will work well for what I need for that. Then after the stumps are removed on the land that was cleared, some finish raking to clean the roots and roots up. Since I cannot buy a rake the size I need, I will just build one instead.
This is what I am going to build, but scaled down of course.