Chosen Solution
since parts are not interchangeable between systems (ds => 3ds) where do I find replacement parts to buy, for my 3DS ? e.g. ABXY buttons , circle pads etc?
You can check on here, and here as well. It all depends where you are and how much time you have to hunt those parts down. I am sure if you Google it, you will fine hundreds of places. Hope this helps, good luck.
