1976 Speedmaster 186.0005 ... Missing my bottom slide clasp

Hey everyone! I have an LCD Speedmaster - I believe 186.0005 with the ST.1285.252 bracelet. Unfortunately, I lost the bottom slide clasp that is used for the top part of the clasp to click into. I tried ordering a replacement from esslinger, but it is ever so slightly different and the original Omega top part of the clasp does not click into the bottom esslinger. I could remove the top part and just replace the whole clasp with the esslinger, but I don't want to solder and further take apart this otherwise perfect vintage bracelet. Does anyone have any idea where I could find a bottom clasp that works with the Omega style top clasp?!