Best Engine Seals?
 

Any recommendation for high quality engine seals (Camshaft, crankshaft, etc..)

I purchased seals from....
Victor Reinz (Front Crank seal & front and rear cam seal)
Elwis (rear crank seal & front and rear cam seal...though, they are not stamped with any manufacturer)
Elring (Front and Rear cam seals)

Are the seals purchased directly from Volvo higher quality or are they just repackaged Victor Reinz, Elwis, Elring?

I am sure that this is the case, especially now as the engines have been out of production for nearly 30 years. Plus they were never Volvo engines anyway, so at best they would be reboxed VW/Audi parts.

No doubt there exist some junk aftermarket parts out there too, but if you stick with the particular aftermarket brands you named which are all known for very high quality, I cannot imagine you would ever have an issue. All of those are OEM suppliers as well as aftermarket suppliers AFAIK. Elring and Reinz especially, or Goetze is another OE level producer. Elwis perhaps is a tier below, but unless it's a critical location like a front or rear main seal or a cam seal, I cannot imagine you would have any trouble.