First lite makes a merino wool glove liner that’s nice and thin. Mack’s has a spandex glove liner that’s pretty thin as wellI hear you. When I find a product I really like I am forced to buy multiples or a year later it's gone from the earth! One I am still mad about not buying a dozen of was the Sitka ultra lightweight wool liner gloves. They were so thin you could put them under any glove. NO ONE makes a similar product today. All the "liner" gloves out there are 3 times thicker. Rant off.
That reminds me, I need to check EBay again!