Wolverine is planning to have some made (top handguard cover), as well as an adapter to use an AR Carbine stock. Price will be about $170 for mount and $40 for the adapter. Drop them a line because they will not go forward unless there is enough interest. They can also bring in the B&T quad rail but it is about $450 and they need 25% down and wait for enough orders.
Also. thanks for all the info. I just ordered a parts kit from Wolverine for $95.
Cheers,
Jeff