Welcome!
Without seeing a picture of them, it's hard to tell. But I'd speculate that they are the Champ Industry sliders made by one of the members here. Very nice product from what I heard. Unfortunately, I don't think he's making them any longer. But you may try contacting him.
Product Information
Without seeing a picture of them, it's hard to tell. But I'd speculate that they are the Champ Industry sliders made by one of the members here. Very nice product from what I heard. Unfortunately, I don't think he's making them any longer. But you may try contacting him.
Product Information