Checkout http://www.vultr.com/?ref=6930424-3B as they offer cheap (starter) VPS services where you can upload and select your own ISO as an installer.
I use it for our 'cloud' firewalls, but should be possible to use it with XPEnology too, I guess... Full KVM virtualisation... multi network (internal net when having more than one VPS in the same location) interfaces, options...
Let me know if it works