Getting Around FTP for plugins

Is there a way I can get around FTP to install a WPMUDEV plugin, particularly the WPMUDEV updates plugin, but anyone of them will do, because I know that once there is a WPMUDEV plugin installed and then I put in my credentials that any of them can be installed via the WPMUDEV dashbaord. The problem I am facing is I have a client who wants the newsletter plugin and possibly others, but his host company is not supplying him with the FTP information. So I thought, maybe there is a way around that you might know about. Thanks.