Wanted: LF: Red dot scope with 1" ( 25mm ) tube

I have a niche application for a 1" (25mm)  tube red dot sight/scope.

I'm trying to copy a set-up I've seen, not realizing that red dots built into 1" tubes are nowadays incredibly rare, & very niche.

The only major manufacturer that still makes them is Ultradot.

So, that said, I'd mainly be looking for an Ultradot Gen 1, Gen 2, or Gen 4.

I'd need the 25mm version of the Gen 1, or Gen 2. The Gen 4 was only built in 25mm.

I am mainly looking for the matte black finish, not the silver finish - though I may consider refinishing one if the price is right.

Any other 4-6" long red dot sight in a 25mm, (1in) tube I would also consider