Getting the depth render texture in single-pass stereo rendering.

I am working on an oculus quest app and am trying to get the depth texture but i get it only on the left eye. My guess is that its cause oculus quest using a screenspace-texture-array instead of a double wide render texture. Is there a way of defining the format of the depth texture using RenderTextureDescriptor? Any insight would be appreciated. Here are my example codes.
In the .cs:

Code (CSharp):

1. private void Start()
2.     {
3.         this.gameObject.GetComponent<Camera>().depthTextureMode = DepthTextureMode.Depth;
4.     }
5.  
6.     private void OnRenderImage(RenderTexture source, RenderTexture destination)
7.     {
8.         Graphics.Blit(source, destination, fog);
9.     }

And the shader:

Code (CSharp):

1.  
2. CGPROGRAM
3.             #pragma vertex vert
4.             #pragma fragment frag
5.  
6.             #include "UnityCG.cginc"
7.  
8.             UNITY_DECLARE_SCREENSPACE_TEXTURE(_MainTex);
9.             uniform half4 _MainTex_ST;
10.             UNITY_DECLARE_SCREENSPACE_TEXTURE(_CameraDepthTexture);
11.             uniform half4 _CameraDepthTexture_ST;
12.  
13.             struct appdata
14.             {
15.                 float4 vertex : POSITION;
16.                 float2 uv : TEXCOORD0;
17.             };
18.  
19.  
20.             struct v2f
21.             {
22.                 float2 uv : TEXCOORD0;
23.                 float4 vertex : SV_POSITION;
24.                 float2 scrPos : TEXCOORD1;        
25.                 UNITY_VERTEX_OUTPUT_STEREO
26.             };
27.  
28.             v2f vert(appdata v)
29.             {
30.                 v2f o;
31.                 UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o)
32.                 o.vertex = UnityObjectToClipPos(v.vertex);
33.                 o.scrPos = TRANSFORM_TEX(v.uv, _CameraDepthTexture);
34.                 o.uv = TRANSFORM_TEX(v.uv, _MainTex);
35.                 return o;
36.             }
37.  
38.             float _DepthStart;
39.             float _DepthDistance;
40.  
41.             fixed4 frag(v2f i) : SV_Target
42.             {
43.                 UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i);
44.  
45.                 fixed4 orCol = UNITY_SAMPLE_SCREENSPACE_TEXTURE(_MainTex, i.uv);
46.                 float depthValue = Linear01Depth(UNITY_SAMPLE_SCREENSPACE_TEXTURE(_CameraDepthTexture, i.uv).r) * _ProjectionParams.z;
47.                 depthValue = saturate((depthValue - _DepthStart) / _DepthDistance);
48.                 return fixed4(depthValue, depthValue, depthValue, 1);
49.             }
50.             ENDCG