You;ve never heard of Ksport? They are one of many fly by night eBay “entry level” brands, like D2 or god knows what
I wouldn’t trust them at all; he’ll, I trust the akebonos more
There are established options for caliper upgrades that have been discussed here, most prominently an adapter for AP racing stuff by our own member darkjak
See here:
Brake Project and Interest: AP Racing CP9668/9660 Kit