WTB mesinger seat clamp assy. Please help me out !!

HI Fellow Cabers > In need of a mesinger seat clamp assy for a long spring mesinger seat. Ive almost got this 1937 mead finish Im building back to original. I found a nice original seat But with no hardware!! I found out it takes a wider seat rail clamp than most seats have so this is what Im Looking for a 11/8or 11/16 inch wide pieces that attach to the rails that hold the clamp in place and the bolt goes thru the whole thing. Some one has to have a few of these laying in a box of parts. Please help me out. Jimbo