You may be lucky and find someone out there who is looking for a safe place to keep their backup disk but this public forum probably isn't the place to look.
There may or may not be several people out there looking to get rid of a copy that is surpless to requirements but put yourself in their situation, you could be a representative of Odd Soft who is trying to find a source of ilegal copies. It's not inconceivable is it.
The version of RANT that I have can be used without the disk but despite the fact that I still think the £89 quid it cost me is extortionate I for one would not pass it on for the reasons previously mentioned.
Sorry to sound so negative mate but you could be putting someone in a compromising position.