I checked their website & they're also listing the the 3.90 ratio gears which we'd all thought weren't being produced anymore. they're also showing a rebuild/bearing kit. here's a link:
http://www.heavychevy.com/html/rearend.htmlthe listing is for 62-72. I understood the Ho52/Ho72 3/4 & 1 ton axles to be the same from 47 through 72. I'm going to call them on Monday & check this out. that axle is one of the best ever produced, finding parts for it would be awsome.