cost of buying and getting a deluxe swing arm will be way tooo high then getting its own stock swing arm tweaked to have a full covered chain cover.
and modifying a RP rear end to incorporate a Delxe Swing arm will be a denters job no road side mechanic would ever be able to do it also Deluxe Swing arm is not going to be any where around a cheap price.
If we think practically the I dont see that you want rear arm to be changed just because of a chain cover because you can add a chain cover to this one as well it only dont have screw hole below which any denter can add to it with minor labor and will also get a full chain cover to it and make sure it make no noise...
The reason I find which is making you think to add a Swing arm of delxe is that you like that square swing arm ...