1921 Triumph SD 500cc SV

The Triumph SD you see here was recorded to have been originally from Ireland, but as you can see is now in pieces. The frame and parts were bought to help restore the Ricardo I own, but once I found out it was a 1921 model Triumph, I decided to find the necessary and missing parts to restore it as it was originally. The front end shown in the picture is incorrect, and for a SD of a later period. I am looking for the correct front end that has the horizontal spring in the front.

One interesting fact regarding this motorcycle is that the paperwork says 1922, but the VMCC Marquee says the frame is 1921, so it must have been produced in 1921, but sold in 1922.