Want to Buy 4x5 Graflok back, not pretty but working

Odd project of mine would call for a 4x5 Graflok back, not pristine, but complete and semi-working.
(or a whole non-working Speed Graphic?)

I have an old "parts" Graphic View II that could supply one, but it's part of the cast (removable) back section so probably not in the same configuration you need if you're looking for one from a speed graphic.