Verizon is a fairly large company and probably has a SAS70, but you will probably need to call or email them to request it. State you are the internal auditor and that you need to review it. They may have a couple different ones, so let them know they provide your ISP so they know which one to send (we recieve 2 different ones from Fiserv for the different services we receive). And don't let them charge you for a copy either--I think that is lame, but when we asked for a copy of Qwest's (I think it was them) they wanted to charge us for it.
Dabbling in banking, law, accounting...the life of a trustee.