CodyM:  The '03-A3 sight is an inexpensive and practical solution for your front sight problem.  The inside diameter of the '03-A3 base will be around .625".  The outside diameter of your shortened Krag barrel is probably around .655", a difference of .030" or the thickness of a Credit Card.  (Take a short piece of 1/2" Dowel Rod, slotted at one end to hold patches or strips of Emery Cloth, and "chuck" the other end in a Drill Motor).  By inserting and working this shaft with emery cloth, back and forth, you should be able to remove enough metal from the inside of the '03-A3 sight-band to allow it to slip onto your Krag barrel.  Another option, especially if your barrel muzzle needs to be re-crowned, is to have a Machinist or Gunsmith 'chuck-up' your barrel on a lathe (action stripped but attached) and re-crown the barrel and machine a step on the barrel so that the '03-A3 sight can be driven on.  You need a slight notch across the top of the barrel to accommodate the cross-pin that holds the '03 sight band in place.  (If you need a cross-pin, make one from an appropriate size Finish Nail).  I'd like to see pictures of your Krag and its 'ugly' aluminum scope mount.  What are you going to use for a Rear Sight?