Need help quick please, axle U-bolts

[bigblock73]

Ordered a WC flip kit a while back, just now getting around to putting it in my '77 C10 w/12 bolt. The U-bolts included in the kit are incorrect (will be contacting them), and are too big. I am having a VERY difficult time finding correct U-bolts locally...for a reasonable price.

Can someone please help me verify I have the correct size for starters?

I am coming up with a 5/8" thread diameter, 3" axle diameter, and approx 8" long. I am 99% sure this is accurate, vut would like confirmation from the experts here.

The only place that carries anything close is NAPA, but they are $23 each!! All other U-bolts are in the $7-10 range. I refuse to spend $100 on u-bolts. I will contact WC, but need to get something quickly so I can finish.

Any help would be appreciated.