MPLS FRR provides 50ms of failover in backbones and about CE-PE you can have ISIS or OSPF protocol to work on, you can check for the BFD feature of the protocol, as well as OSPF and ISIS both support the fast hellos also, so you can try that too!!!
Talking about Layer-3 and Layer-2 vpns you can have both types of vpns carrying on MPLS TE so you can have benefit of FRR!!!
TE-FRR is definately a good option for fast convergence(sub second).To achieve <50ms convergence you need to select right hardware like cards with LoS feature(SIP-600,WS-6704 etc) otherwise TE-FRR convergence time will be in multiples of 100ms.. we observed 300ms(again it is dependent on Box what you select).
Another key thing is either you select TE-FRR or IGP with BFD, using TE-FRR and BFD doesn't make any sense.
Introduction: The "external-out enable" command is available for
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