Look at tread 796, german "emfeller" sold me springs and the
yoke, very good repro (my opinion) at reasonable prices.
My Pearson king comfort seat and pan came from hengeloman
wich I think is Johns source?
I think there is a small difference for the originality
freak in the repro pan compared with a original (bolts to be
attached to the yoke have wrong threads?)but I find the seat
great, leather quality stunning with a nice stamp.
I too bought the seat forward extension from Easy Russ and
made the yoke to pan brackets from stainless.

Good luck

Sverre

----- ORIGINAL MESSAGE FOLLOWS -----
I am completely rebuilding a 1929 KJ 4.  The project is
going somoothly except for one problem.  I have absolutely
none of the seat hardware.   If anyone could advise me as to
here I might be able to find some seat parts I would truly
appreciate the help.   Thanks