The new loader is KL451, it is made in Korea. Not sure if there are any other choices available to fit this tractor at present, loaders for DK45 will not fit right as there are quite a few changes, not just sheet metal.
Good news is there is 9 more degrees of roll back and 300 more lbs of lift on the KL451 than the KL1590. specs are on Kioti's site now