Interate in a list and use for_each in the same resource

resource "aws_instance" "recreate"{

    ami = "${var.ami}"

    instance_type = "${var.instance_type}"

    availability_zone = "${var.availability_zone}"

    tags = {

        name = "${var.name}"

    }

}

data "aws_ebs_volumes" "get_all_volumes"{

    filter {

        name = "attachment.status"

        values = ["attaching", "attached", "detaching"]

    }

    filter {

        name = "size"

        values = [8]

    }

    filter {

      name = "attachment.instance-id"

      values = ["i-04651fcafa7086fc7"]

    }

}

resource "aws_volume_attachment" "ebs_att" {

    for_each = data.aws_ebs_volumes.get_all_volumes.ids

    device_name = "/dev/" #need to get the index of for_each or something like that

    volume_id = each.value

    instance_id = "${aws_instance.recreate.id}"

}

In the code above I recreate an ec2 instance that can have different ami, type, etc.
I need to attach the volumes that it had before the recreation and for that I need to interact within a list of device names for my volumes, however I’m already using for_each . I tried to use index() function but it doesen’t work. How can I do it ?