There was a Dansk 914-6 muffler NIB for sale recently here on the World.
I responded to that ad about a week or so ago and found out it would not fit a 4, only a 6er. Dont know if its still for sale but here is the link.
http://www.914world.com/bbs2/index.php?showtopic=111319And I found that Pelican lists the weight of a Dansk muffler for the type 4 as 28.4 pounds.
Dont know if thats net or shipping weight (probably net). Plus there might be oversize charges, dont know.
I shall wait until the original poster weighs and measures later in the week.
Curt