Need to drill hole in door glass???????

My passengers door window has a partly rusted bottom retainer, the part that holds onto the glass going up and coming down. The glass is seated tight within a rubber insert (normally) the rubber insert seats in a metal channel that attaches to the sizzor riser. When I go to put the window down, the glass slips out of the rubber and metal channel, and hangs up!

I want to drill a hole at each end of the glass (bottom) and with cable ties looping around the metal channel and through the holes, in order to retain the glass while operating the window up/down.

I feel that this will work and save me the trouble and expense bying a new metal channel, etc.

Is there such a thing as a diamond drill bit, or some other means of drilling through glass? BB