well, after many attempts at scoring what I wanted/needed on ebay, this is what I ended up with for the modern front end....and coincidentally decided to upgrade the rear too
TL1000S front end, Sportster 19x2.15" front wheel, sportster 18x2.5" rear wheel, GSXR600 rotors, R6 rear caliper and rearset. will have to make a custom brake-stay for the rear, some spacers for the caliper to make it play nice with the axle, and custom spacers for the rear sprocket and front calipers (which will also serve to correct the difference in bolt patterns)