I know Jelco made Arms for a number of compaies, being Audioquest, Linn, Graham, and I believe others like Sumiko, and perhaps others. (BTW,I seen your query over at the Asylum as well, and see you found the site, and the Lift)
The problem was, I cannot offhand remember which Arms Jelco made for Linn, and that why I was hoping somebody here with more knowledge than I could perhaps further elaborate.
Worst case scenario perhaps if this is not a workable solution, is to sell your arm to offset the cost of another Arm. From what I understand, Arms are a hot item here on audiogon, and sell quickly, even your challenged Arm would probably be scooped up quickly by someone.
Although the now discontinued Audioquest PT-9 Arm may not be quite as good as the Ittok?, it might be a cheap, suiatble alternative, and may as well be a drop in fit, without major surgery needed on your table.
I believe overall length of the PT-9 is 229mm, and a S-P distance of 210mm-211mm.
I bought one recently from Elusive Disc at thier closeout sale price, I'm very happy with it, and run a ZYX Airy 3X with no problems.
Again Mark, iwh you the best of luck, and hope I've been of some help to you. MarkD