The LED light and additional custom PBT caps(it come with thick PBT, but not rainbow or sub dye) are added on item you that have to buy it.
However, LED DIY should be able to done by yourself, find a LED in your local store is not that hard. For me, I am mostly worry about posting 61 LED with the package might end up with a lot problem with transportation and custom problem too. You only have to put the LED into the slot, very easy, it is ready to use.
Just saw this sentence. From what I have read, you have to remove the solder from LED holes on the PCB first, then solder in new LEDs. Not as easy as just plugging in the LEDs.