I had half-shafts made at thedriveshaftshop.com. They were very nice, but a bit pricey. They have the measurements on-file to do rear axle (half shafts) and main prop shafts, so you can order direct without sending in your old stuff or taking measurements.
I felt the service was great and the product was superior. About 2x beefier than stock as I opted for the 900hp versions (you'll add a bit of weight). My only issue was the main locking retaining nut they shipped with did not fit under the wheel adapter on SPO-408, so I had to go with a different retaining nut with a smaller shoulder (check the clearance before you use their retaining nut). Other than that it's a drop-in replacement and I've had zero issues with them in the last 3 years.
http://www.driveshaftshop.com/downlo...ss_catalog.pdf
(see page 30)