First off you're not going to find one I can tell you this now, if you do, you're getting the VPS from a company illegally utilizing the Windows Licensing Agreement and risk losing everything. As a SPLA Partner I can vouch on this part, licensing is expensive and nobody is just going to throw money down the drain.
The cost for a Windows Server 2012 Standard Edition license on an SPLA Agreement is $19.99 per month, that's per instance. That's not including hardware costs, network costs and staffing costs.
What do you plan on using this VPS for?