I want to change out my rear fender with something more rounded, any suggestions for a good fender that will work without a lot of tedious work?

 

I'm not sure but I have somewhere heard of a few people using the wide glide fender.... Not sure where I got that from.....

 

Yes, common swap. Looks great. This is a pic from these forums:

 

Because you want to avoid tedious fabrication and the Dyna is a wet sump bike and the touring models use a dry sump engine you will be limited to Dyna specific fenders. These could be OEM or after market. The reason is the fenders for the touring frames stop at the oil tank.
Bob