Where can i find replacement parts for DSLR lenses?

I have a Quantary AF / 28-90 MM~1:35-5.6 Macro Lens for my Nikon.
The ring mount thingy… Is broken so when i pop it into my camera it just falls out. Does anyone know where i can buy this part?

Ritz camera sells Quantary lenses.

I would think that they would have the parts and could repair your lens

You may find it's cheaper just to buy another lens. Quantaray lenses aren't that expensive to begin with.

Buy a broken lens that has a good mount! Unless you are a repair center, the chance of a manufacturer/vendor selling you repair parts is slim to none (and Slim was last seen heading out of town.).

Unless you know how to fix a lens, you would be best either taking the lens to a camera shop or investing in a new lens…