Oculus Quest/Rift Mirror Shader

Hey guys, so I've got a mirror effect that works for the Oculus Go, but enabling Head Tracking on the Quest will cause double images/offset.

From what I've read it could be because of the introduction of Asymmetric Fov.

Code (CSharp):

1.             v2f vert(float4 pos : POSITION, float2 uv : TEXCOORD0)
2.             {
3.                 v2f o;
4.                 o.pos = UnityObjectToClipPos (pos);
5.                 o.uv = TRANSFORM_TEX(uv, _MainTex);
6.                 o.screenPos = ComputeNonStereoScreenPos(o.pos); //ComputeScreenPos
7.  
8.                 return o;
9.             }
10.  
11.             fixed4 frag(v2f i) : SV_Target
12.             {
13.                 float2 uvRefl = i.screenPos.xy / i.screenPos.w;
14.                 fixed4 refl = tex2D(_ReflectionTex, uvRefl) * _ReflectionStrength;
15.  
16.                 // Combine main color and reflection
17.                 fixed4 col = saturate(_Color + refl);
18.                 return col;
19.             }

Does anyone have a working mirror shader?