Nonsense on replacing the whole window. They just want to dig deep into your pocket!
If that glass can come out with the window in place then it can be put in with the window in place.
I suggest making a template from a rigid piece of material, such as thin but stiff hardboard, or thin plastic sheet or similar. Use basic cardboard to start to get your shape, then transfer it to the thinner rigid board. Put it in the opening to make sure the shape is perfect. Find something round that has the exact radius of your window, a jar lid, small plate, something. It's easier to trace your radius with something the same size.
Then take it to a glass shop and have them make one. You will have to specify the tint, as it comes in many colors and shades. They will need to know the exact thickness, so bring them a broken piece to measure.
Most glass shops can cut the glass, but they need stock of the right glass. Tempering glass requires a special process of heat treating it in an oven designed for that purpose. If you use a local shop they will likely have to send it out for tempering. The glass has to be cut to shape first, then tempered. You cannot cut tempered glass.
I would go directly to a glass production shop that has the equipment to cut and temper. Local guy will do that then mark up the piece to sell to you.
(I've been in the glass business for 40 plus years)
