I have done a few retro days. I had my old equipment, so I did not have any issues.
If you need to look for gear, network with your buddies. If they don't have something, they may know someone who does. Also check eBay. There are plenty of dated skis there.
Here are skis to look for:
Olin Mark IV
Kastle National Team race skis (RX12, RX15)
Any Rossignol race ski (ST, SM, FP, 4S, 3G)
Any K2 Comp Ski (710, 810, 712, 812, VO Slalom)
Any Volkl race ski preferably something with the tiger stripes.
Any Blizzard Thermo race skis.
Dynastar race skis with the Barney Hart dampener
Pretty much any race ski from that era.
I am sure that others will have some suggestions.
Have fun with it.
Edit: Most likely the shops won't be able to work on the bindings. So make sure what size boot was in the binding before you make the call, or just replace them.