CA WTB: Complete Factory Rad Overflow Reservoir for 72' K10

Hi guys, I am looking for a complete factory overflow radiator reservoir for my K10. I know there is a for sale ad for one on the board (and it looks good) but I am looking for all original and I actually prefer it in used shape (to keep equal dignity with the rest of my engine compartment); I just need all parts to be there--bracket reservoir, cap, hose, etc. Thanks in advance. Martin