Since the OP asked where to get replacement springs to replace lost springs I gave him links to MT springs like he was looking for.
"So I suspect" that he is in need of some springs since he asked about them.
Richard Webster
Yes, I agree that he needs some springs.

I understood that question differently. Since the OP mentioned rapido (T-shank) couplers, to me that meant the springs would be ones used for rapido couplers (not for MTL T-shank couplers you pointed to). Rapido springs have larger diameter, and are usually quite a bit stiffer than MTL T-shank springs.