Slots and centerline lookalikes (the lookalikes are not solid, which were the autodrags) are both available new from summit in 5 on 4". Real centerlines are kinda rare in that bolt pattern and would have to be used,
Centerline Tool, the company that made centerlines, went belly-up about ten years ago
The "centerlines" being sold now I think are Chinese and don't sell 5 uon 4.
