Technical 8" third Member Builder

I'm looking to change to a positive traction Ford 8" rear differential.
Do any of you have a recommendation for a good builder of these?

 

If you can't find a builder, I'd recommend getting a complete chunk from Quick Performance. A locker unit for $870 is a pretty decent deal.

https://www.quickperformance.com/Ford-8-Complete-Center-Section-Third-Member_p_39.html

 

Thank you. That's who I keep coming back too.
They seem to have very good reviews with very good customer service. They have what I want.
Everybody's favorite auction site, has several builders. They seem OK and have good reviews. One is in Kentucky, another in Delaware and another one is in New Jersey. They seem to all be on par with Quick Performance's pricing.

Local....All I have around here is 4x4 guys, that or general automotive shops.
I'm leaning towards Quick Performance.

 

Quick for the win. Have bought many from them over the years

 

Save $500 , do it yourself , works great 50k street miles
Ford 8" & 9" use the same unit .