Here are some parts I have. I bought a rack for a Sprint ST 2001 earlier this year and bought the hardware kit on eBay. When my rack arrived it had some mounting hardware as shown. However the only actual part I see that is the same as I used is the piece on top left of the photo. There are other additional parts required.
Here is the diagram of the kit A9508014
So you can see I am short a few pieces, sorry. On the diagram part 2 is what I have and part 3 & 4 are what you need in addition. Together the three parts clamp to the rear sub frame. The bolts you can get anywhere.
Part 2 top mount bracket part number is A9750111 (which I have)
Part 3 lower front mount bracket is part number A9750108
Part 4 lower rear mounting bracket is part number A9750107
Hope this helps.
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