While I can't identify the set of Peace Dollars shown in recent issues of The E-Sylum I have found adsfor something similar.

Ads offering United States Mint Silver Dollars have appeared in popular magazines and somelocal newspapers. These were for Morgan Dollars. Attached is a copy of such an ad.

Popular Science, November 1980, page 152.
The Rotarian, November 1980, page 51.
The Indianapolis Star, February 1, 1981, page 162.
Field & Stream, February 1981, page 138.
The Rotarian, February 1981, page 55.
Popular Science, February 1981, page 172.
The Journal Times, Racine, Wisconsin, February 22, 1981.
Playboy Magazine, February 1982, page 198.
Kannapolis Daily Independent, November 22, 1981, page 74.

A similar set of three Peace Dollars was advertised in:

The Morning Call, Allentown, PA, May 23, 1982, page 159.
The Pittsburgh Press, August 22, 1982, page 395.
Springfield Leader and Press, August 22, 1982, page 98.
El Paso Times, October 10, 1982, page 105.
The Daily Oklahoman, October 10, 1982, page 221.
The San Bernardino County Sun, November 14, 1982, page 96.

Numismatic Collectors Guild was the subject of several lawsuits. In a trademark infringementcase they were identified as a division of Novel Guild, Inc. They claim to be a member of theRetail Coin Dealers Association and that senior officers are life members of the ANA.

Later doing business as The Numismatic Guild, they placed full page ads in The Numismatist.They stated, in part:

Stephen York Rappaport was listed as company president. Mark Shoemaker also worked there.In 1989 the contact name was Ronald (James) Manganiello.

When I was a coin buyer for a local dealer, I came across sets like these occasionally. We wouldimmediately break up the set and throw the coins in a bucket with circulated Morgan Dollars. Idon't recall seeing a set with peace dollars but that may just mean that they made no impressionas anything special.

To read the earlier E-Sylum articles, see:
NOTES FROM E-SYLUM READERS: JUNE 14, 2020 : Query: United States Mint Silver Dollar Collection(https://www.coinbooks.org/v23/esylum_v23n24a13.html)
NOTES FROM E-SYLUM READERS: JUNE 21, 2020 : On the "United States Mint" Silver Dollar Collection(https://www.coinbooks.org/v23/esylum_v23n25a14.html)