Dunno actually if the feature exists in IOS now. If you have a link about this please post it here.
Maybe you should try to play with different Loopback addresses. For instance create two Loopbacks on the tail-end, then setup two TE-tunnels from head-end. Be sure to advertise VRFs with different next-hop (pointing to Lo1 and Lo2 accordingly) via MP-BGP. But i'm not sure that there's no "hidden obstacles" with this scenario.
I have plotted below a similar configuration to my customer setup for the per-vrf TE which you suggest.
PE2 is a central vrf and has extranet to customer 1 and 3 vrf?s. Since there will be a defined bgp nex-hop on the cust_1 vrf pointing to PE2, and while central vrf will also have bgp next-hop pointing to PE1, what will happen to the PE2 central vrf going to PE3 cust_3 vrf traffic?
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