Basically after updating my plugins updated and stable version, I close auto update of plugin and themes. This closure do not disturb my custom work done in plugins or themes file. Now after an year, I opened another website for which I need those same plugins. I searched for the same plugins in wordpress plugin directory but their names are changed little bit. Also clicking on plugin's author link and on plugin site links takes me to website of plugin developer and not to wordpress plugin download link. Well, I tried searching with related names and then compare authors name and their website and found it finally.
It takes little time, here if there is something like unique plugin ID for each plugin, that will help to search quickly. That ID is visible on plugin's directory and also after "Visit plugin site" text on Installed Plugins page. Also search is possible with that ID. It will help website designers to search for specific plugins quickly and may be in other things.