"Basically if you want to have access to non time limited versions of enterprise products of Exchange, Lync, Sharepoint, System Center, etc. you need to take a $6000+ MSDN subscription. Currently I’m paying for TechNet Pro myself which costs 375 euro and I will take a Technet Subscription for this last year. I hope that Microsoft will have come to its senses by then and has provided a proper alternative. For now I would like to ask everyone that feels the same to sign the petition to get a decent TechNet alternative."
I guess the closest thing would be their MSDN subscription, except that it is aimed more at developers and it costs $699 initially with a hefty $499 annual renewal fee. Not sure that it is worth it. Here is the LINK if you want to check it out.