I meant to reply to this earlier after I saw that you were including L&J Foxes. You can take any decent Fox.35 and build your own L&J version. The information is out there, nothing in the way of a machine shop needed. I don't know if Randy's 'Super Fox" had his crank shaft in each one but might be the biggest difference. I think everything you need to know has been here on Stunthanger.
Type at you later,
Dan McEntee