I know you only want the accessories but those probes are thrown in for free compared to the siglent pricing. Also in my experience the downside of chinese probes is that most don't come with the spring earth clip, same with this set of accessories:
https://www.aliexpress.com/item/32920850408.htmlYou may be able to find the exact set you want on alibaba if you search hard enough though.
I made you a picture, the only difference that I can tell is that the oem sheet claims a wider compensation range!
E: I just checked and there doesn't even seem to be any siglent branding on any of the contents of the probe pouch that came with my scope.
E2: It just occured to me that I didn't state the accessories are all interchangable, so I would personally swap them to the probes that came with the scope in case the frequency response is matched to the front end.