I have spent 3 days on this but the solution turned out to be simple once I got what was left of the anchor out of the toilet. This requires some patience, wihtout brute strength.
Called Kholer, gave them the product number for the toilet, they gave me the product number for the item, anchor nut #85040. Even has a picture of it on line. Kholer wanted $8.90 for the part, and $7.95 for shipping plus tax.
I got the list of local Kholer parts dealers, called the nearest one on the list. Not in stock but they ordered it for me after e-mailing me an authorization form which I sent back with payment. They had the part sent directly to me from Kholer. Cost: $7.67 TOTAL.