actually -- leather case handles and straps are fairly easy to find
Dysons, Jeff's Outfitters, Galazans and a few others carry case repair/build parts
and antique trunk repair sites are a good source for parts
such as
http://www.trunk.com/handles.htm
as for gunfit in the walnut cases. yes - not padded - but I have been told the insides were soft wood - a little less abrasive. and if you notice the lids have rods to press the gun in place.