Tensioner, Pivot lock shoes, tilt latch

Thanks for posting. Your coil pivot shoe resembles our 15-111. You mention a single support but your photo looks like it might be a double support like 15-150D. These parts are usually used with the series 160 coil balance. It is hard to tell which tilt latch you have without measurements. I've made a list of  a few latches you might want to compare yours to.

You will likely need Series 160 coil balances. You should remove the part from the window to check, of course.

The coil is marked with a number that tells you which Series 160 coil to choose.