Holiday Maintenance Tasks: '86 420 SEL

[Randy]

HI, My maintenance plans were interupted by the onset of the crud (me, not the car); as I return to availability, I plan to (1) replace the cam cover gaskets; (2) check chain stretch (i.e. compare the timing marks, etc.); (3) replace the power steeering hoses. I've watched about all the 007 reruns I can take.
Are the replacement gaskets and hoses available all over the Internet good quality, or is there a good reason to buy OEM at the dealer? Do I need something besides the two (left and right) gaskets to complete this?
Most of the gaskets available on the Internet sites list the manufacturer as "Germany".
All advice anyone cares to offer will be appreciated. Regards.