how temporary?
as in a hours or days?if it's just hours then i'll probably leave it.
any reason why you don't just use dropbox all the time as it would appear to be more stable than using here are the source?
The dropbox links will remain active hopefully forever now......(they should have always been anyways but the plugin changed how it handles links)
there may be an issues with dropbox in general if there are too many download requests....that is why i had 2, as the plugin chooses at random which to use, if one is down then the other is used.
I say it may be temp as the linuxsat one is not sorted yet, if and when it is.... then the source.xml may or may not change again.