Springs, T Bar (aids in tilling window in, and a T Bar holder.
Thanks for reaching out to us! This balance assembly uses the 15-180 Coil Balance Shoe. I'm confident this is the correct replacement but be sure to compare the dimensions below.
The pivot bar we suggest using with this shoe is the 26-040.
The compatible coil spring is the Series 190 Coil Balance, secured to the shoe using the 33-073 screw. You'll need to look for a stamp/marking on the coils to determine the correct weight option. If yours does not have them, please see the video tutorial below.
The clip, anchoring the springs to the window, is the 15-181 Double Support Detent Clip and 15-182 Balance Bushing.
The part you are searching for is the shoe cam. This isn't sold separately from the shoe, so you'll need to purchase the entire part. Ours has a differ cam style, so you may need to consider replacing the pivot bar with the one mentioned above.
Please let me know if you have any additional questions.