Bow Sight Help

[Flintlock1776]

I am looking for the Summit Hot Dot F.O.X Add-On LED LIGHT to go with my bow sight. One guy way, way overpriced it on eBay.

Anyone know where I can get one? It was only $30 before Summit / EBASCO discontinued the line but I love the sight, it works for me but I'd like to have the light attachment for early dawn/dusk. It has real tiny threads but I can't find the details on what the size is exactly.

If not the HOT Light anyone know of any other brand that has a tiny thread deal I could use in its place?

Thanks!!