|Project:||Share Buttons (AddToAny) by Lockerz|
In my hacked version, I've added the option 'custom code' to addtoany.admin.inc, and changed a few lines in addtoany.module so that, if custom is checked and custom code is provided, it uses that (instead of the custom image url). It seems to work.
The changes are minimal, I'll attach the altered code from addtoany.module.
I think (something like) this would be a nice feature. If there was a better way to do this, I didn't find it :-/