Copying BP /Group Avatars from one instance to another

We have dev and prod instances of wp with a bp theme. We have figured out how to copy the data from on instance to another using some generally available utilities. One nagging problem revolve around buddy press group avatars.

It looks like buddy press does some processing on the avatar image when you upload it through the group admin settings page. WP or BP change the image name, making it really difficult to port these images from one instance to another.

I uploaded a file called fauweblogo.jpg through the group admin settings console and wp loaded it into /wp-content/uploads and create 2 files with new names:
1078cf9578aeeaae5e30b3e27e75fad8-bpfull.jpg 1078cf9578aeeaae5e30b3e27e75fad8-bpthumb.jpg

I'm using the group hierarchy plugin, maybe that has something to do with it.

In any event, this is a real problem for us as we have 1000s of groups.
Does anyone have a solution for this? Any best practices for keeping two instances of WP in sync?