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Cannot say for sure for your IOS version, and unsure whether VRF will be a problem, but there was a hidden BGP command to use multiple next hops. Off the top of my head, don't recall what the command is. It's noted in some other forum posts, and if you cannot find it (search these forums), likely someone else will post the command.
[edit]
Found the command I had in mind:
bgp bestpath as-path multipath-relax