Saarinen Executive Chair ... No Legs - Chrome to Wood  

There are existing screw holes to explore. You may need to make a small new hole in the black dust cover to determine if the underlying material will hold a screw as well.

Seems simpler than finding two sets of wooden legs to me.

https://www.google.com/search?q=threaded+screw+insert+for+chairs&client=...

Releazer, see if some of these matches with what you have in your chairs. The rigid back & arm part is made of a molded resin/press wood type material while the seat is made of molded plywood. These is what I have in the old examples I own. You will need a nylon or some kind of hard plastic/rubber spacer for the screws that ends up on the plywood seat part to level with the screws on the back/arm wrap around part.

I don't know how old or recent your chairs are but there was also an earlier squarish metal legs similar to the H-base Eames chair used in Hans Knoll office in 1951.

https://goo.gl/images/TFqpPZ

The screw holes of the older several versions of the four star (& newer 5 star) all metal or wood/metal bases are probably easier to re- fit, locate the holes & find replacements but it is not the version you want. These were also used in other Knoll contract/office chairs by other designers for Knoll (also for Art Metal Inc.) These are either swivel or fixed, with height adjustment & with casters or glides.

The only way I could think of sourcing replacement wood legs are from versions that the chair part is in very poor condition to restore.

If we are still in 1991, I will tell you to go to Harvard/MIT junkyard in Cambridge MA where there used to be pilles of these Knoll chairs left outside to rot & were free to anyone who wants to salvage them.

The armchair version with the wood legss are definitely closer to the 1940s Eames/Saarinen organic chair design for MoMA.

I'm not sure the exact date on the chairs I have but they are for sure not vintage. They are around 5 years old I'd guess.

tktoo,

Are you suggesting that all of the possible base mounting holes might already exist in the plywood seat/fibre composit armature? I will certainly see if that is the case.

minimoma,

I agree with your hardware suggestiong. I have a trade account at Knoll and have requested they some info from them. Sometimes they are willing to sell parts etc so we will see.

Thanks for the info!