The kiwi dongle is pretty much the same price as the apple dongle, about 10 EUR. More powerful DACs in the lighter format are more expensive but they are also more powerful than what you'd usually find in a phone with headphone jack.
Yes, the ksc75 is not an IEM, I had to look it up. I was only talking about IEMs before.
In the age of the internet buying DACs is a non issue.