Not that I don't want to help you, I just don't know a relatively inexpensive and reliable place I can recommend to you. The MUSES I have are all from other amp, so technically I didn't buy them. The most reliable place to get real MUSES01/02 will be Audiotrak Korea, but they are pricing them $79 a pop + shipping. They make gears and use the opamp themselves, so there is no question of fake. Otherwise you have to risk it on eBay with the Chinese / HK seller, which could turn out to be fake.
Another fairly reliable way is to order them from Japan using forwarding service like Tenso.com + Rakuten. This is probably the cheapest since MUSES are cheaper in Japan.
Hi ClieOS, how are you?
Im really interested in using the tense service, looks cheap to have access to all japanese stores. Have you ordered yours using Tenso + rakuten?