If I'm depping I'll usually get CDs in the post (or digital equivalent) and maybe one rehearsal to top and tail stuff. Most of the time though any diffferent arrangements are hastily mapped out during soundcheck. Often I'll have to make my own charts, but TBH, most cover bands play the same sort of stuff, so once you've done a couple then you start to build up a library.
£50 for all that is a bit optimistic though.