Pella Hinge Shoe Pair

Casement windows from early 90s, i believe 91. The plastic sliders are deteriorating from age. Need top and bottom

Looking for this small brown piece in the bottom corner of the window. It keeps the corner of the window up and in place and sliding smoothly with the shoe hinge but doesn't look like it's attached to the hinge.

I am seeking a hinge/roller assembly for a 40+ year-old Pella casement window, as shown in the attached photo. This assembly mounts on the bottom of the wood/aluminum-clad casement window, enabling it to slide as the roto-operator is actuated. As you can see from the photo the assembly is missing ... (cont.)

The only serial numbers I found on the outside of jamb was a sticker: WTEAS2959L AND WTEAS2959R I need the parts that screw into the top and sill, that connect the arms shown in pictures

These plastic guides are all failing and you have previously identified my window as Pella installed in New Mexico. Thanks!