You can get them on his e-bay site. The Wide bore is the recommended size for Xelento. https://www.ebay.com/itm/SYMBIO-W-Wide-Bore-Silicone-Memory-Foam-Special-Hybrid-Universal-Ear-Tips/122782691934?hash=item1c966b325e:g:G5IAAOSwN6JY~ugP These tips push out everything the Xelento has to offer imho. You can specify what sizes you want on check-out by leaving a note. If you don't you'll get three pairs in S, M and L size.