Glad to see I'm not the only one interested!!
He does have his hotline on the fb post. I haven't called it yet, simply because I don't know if it's purely Bahasa or not. However I do know a few people have been able to get in contact with the creator by writing! So I might try that to see if it's possible to get some decks outside of Indonesia.
I, like most people, am a frequent purchaser of online goods. Shipping could be expensive, but I guess we'll see! I agree that a more experienced third party might be the safest route.
Hopefully though, Tarot Garden will have more luck than I. Please keep me posted on this