Layer2 data encryption between switches

Currently we lease fiber for a remote branch from our ISP. The link is a gigabit connection and we use cisco ASAs on each side to encrypt the data between. The ISP uses Q tagging to route my data from the main building to the branch. I am wanting to remove our layer3 devices and push VLANs to the remote branch. I need some way to encrypt the data layer2. Does anyone know of a low cost solution for this. I have seen many layer2 encryption boxes but they are expensive. Anyone have any ideas?
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Justin EllenbeckerIT DirectorCommented:
The only thing I know of is the catalyst 6500 VPN service module.  Which is actually EoL and this is the recommended migration:

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MopepAuthor Commented:
Yeah. I saw those, but we only have cisco 3750's. nothing that large for the module.
Thank you
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