https://github.com/opencost/opencost/blob/v2.5.3/pkg/cloud/a... is the source URL, and while I haven't been in the opencost ecosystem for a while, I'd guess there's a non-zero chance you could legitimately just ask it to price your aws-emulator resources. I am pretty sure there is a terraform/opentofu integration, too, although I don't this second know if it is within opencost or is a separate project