You may probably tried to download some files from hoster which may be slow, not supported, having issues at the moment etc. So, basically - you were not be able to download for some reason. What can you do - simply, take a look at those websites below.
Go to some of them (or all of them if you like) and use a search option to find your links! Note that some of them may require registration to be able to search on them. Websites are not sorted by any priority or anything - just go trough all of them and choose which ones best suits you.