thin threads on which life clings

i cycled (on the one tough gear the snapped cable left my bike in) to Bicycle Works today to get my bike repaired.... the mechanic at the Works said he could fix it in a wee while so i thought i'd wait.... but while fixing it, he realised that the dreigang (3 speed) shifter cable he was replacing with the Sturmey Archers cable will not fit the co-joining part of my bike's unique coaster gear system by Sachs (it allows me to do a quick back pedalling to brake; truly rare today -- my bike's a vintage! wow.)... but the manufacturer has been bought over by Sram. my heart sank when i heard the news... slightly dazed i asked if anything could be done.... the mechanik said he would have think about it and try to see if he could fix something up... i left my poor bike and contact details and walked into town to get some stuff done...such news are like medical notifications from the doctors that one has been diagnosed of cancer or something terrible... i was hoping that it would be benign rather than chronic....but the thought of never ever able to cycle on the lovely silver Slalom was painful... on my way home, i passed by the Works again to check if something might have come out of the 'thinking'..... i was glad to find my bike on recovery... a hybrid of new and old cables had to be created; bits of the old that fitted the gear hub connection was 'fused' with the new cable that is attached to the gear shifter with a sort of anchorage piece. it looked alright although i am slightly worried that the old bit might one day snap when the thinner wires that make up the thicker piece wears thin. so now i am wondering if i could find a new cable.... i tried looking for the specifications ... i think this cable is the closest match to the model of the gear system i have (you probably need to zoom in)... if anyone has a clue where i could possible find one... please please let me know! thank you.