Yes, contact LaLeche League. They will know what is available. Not sure what your mom remembers, and remember, it was a long time ago, so she may not be remembering correctly. Your nipples do need some stimulation in order to continue making milk. If you are wanting the shield, and at work we call them nipple shields, to help your sore nipples, this is not the answer. With nipple shields, baby mostly sucks on the hard plastic, but does also get some of your nipple. Milk does then collect in the hard plastic nipple the baby is mainly sucking on. I haven't seen those from Target you are talking about, and can't remember the name of the brand our hospital now uses, as the Medela one was on back order, I think. You won't find anything in glass anymore because of the safety risks.
Good luck. Defnitely contact La Leche League or your hospital's Lactation Consultant for any help. And remember, with time, our memory can differ from reality.
R.