The Mancini viscous package looks like it is sourced from Bouchillon. Last I looked, it is viscous but not thermal... no coil in front.
Bouchillon has both types... I purchased a thermal type to replace a damaged MP unit recently with 6 blade fan. Looks nice but not heat tested yet.
As mentioned above, you can DIY for the MP kit. Get a fan from a JY 70's small block car and a fresh clutch from the AP store. I prefer Hayden/Napa over other alternatives.
