I used jbweld. I sanded both surfaces used a blob of jb and let
it cure for a day prior to reinstalling and it's held for a couple
of years now. It looks like hell but probably only to me.

You can buy new vent windows from volvo / cvi for about $50 and
hopefully that comes with the latch. I couldn't find a part number
for the latch itself.

I don't like those things that IPD sells -- they leave a small
hole where the window rubber must go around them and so you always
have a small leak and it makes noise.
chris