you COULD make your own out of copper sheet, but it would be so challenging you'd be better buying one. Just check that it REALLY is your gasket and not a stripped stud. The other thing you can do is sand the surfaces on glass to make them flat, they sometimes warp and that can cause a leak.
I've made several of my own gaskets and yes it is a bit challenging, I use gasket hole punches and then the hardest thing to do is the big hole in the gasket, I plan to make a tool for that in the future so it isnt so dang much trouble getting that hole right.
I use 0.016 Alum. sheeting for mine because it is 0.011 thinner than the stock 0.027 Gaskets that I have removed from my engines, then I coat them very good with Permatex Copper Coat spray and Wah Lah.......A bit higher compression and I save a few bucks on buying the stock gaskets and having to wait on them.
Sorry i got off topic here, just got me thinking about the gaskets.....
LS614 is right, a head gasket leak can cause that chirping noise for sure.
Also LS614 made a great suggestion about lapping in the head on a sheet of 220 or 320 sandpaper taped to a piece of sheet glass, apply nice even pressure at the center of the head as you move the head in a circular motion, this will remove imperfections and give the head a nice smooth flat surface to seal up good on the gasket, it's best to do both the head and the jug, but I think most of the time the warpage is the head and the jug surfaces on my engines have all been good and flat.
Peace