3750 interface bandwidth limiting

I want to police customers traffic into 20mbps.

Ingress policing
Create policy map:

policy-map shape-20  
class class-default  
police 20M 400000 exceed-action drop  

Assign policy map to interface:

interface FastEthernet1/0/2  
service-policy input shape-20

Egress policing
Unfortunately, policy-map containing police action cannot be attached to interface in egress direction. So here is how i limit it to 20mbps:

interface FastEthernet1/0/2  
srr-queue bandwidth limit 20  
srr-queue bandwidth shape 0 0 0 0