L2TPv3 Vendor Support

Hello all, We've run across a project that requires support for several (ie: 10-20) L2TPv3 tunnels due to user needs/constraints. As far as I can tell, the only major vendor supporting L2TPv3 features at this time is Cisco; however, I openly admit that I'm not very familiar with the more traditional service provider offerings. While I'd love to drop a ton of cash on some new Cisco gear, I'm afraid that will push our budget over the limit. Is there a box out there with decent port density at a reasonable price that supports L2TPv3? It doesn't need a TON of management features.. it'll only be used as an L2TPv3 aggregator. I very much appreciate any suggestions or insights. -- Brad Fleming