For those of you who are desperate to get the parts for Birdy that aren't available in your location, you can consider buying from Japan directly with the help of a proxy bidder.

I used to use Tenso's service. It isn't the cheapest but it's easy enough and works. It can do proxy bids and also can purchase directly from a shop, and then send the item to your location.

https://www.tensojapan.com/en/auction

Yahoo Auction Japan often has some interesting and hard-to-find parts for older Birdy bikes.

https://auctions.yahoo.co.jp/search/...BC%E3%83%84/0/
https://auctions.yahoo.co.jp/closeds...=bd-1&b=1&n=50
https://auctions.yahoo.co.jp/closeds...=birdy&x=0&y=0

I found this Japanese shop selling a lot of items for older Classic Birdy and Birdy 2. (In the Japanese market, Birdy Classic V1/2, Birdy 2, and some New Classic Birdy are called BD-1. In general, nowadays New Classic and Birdy 3's are named as Birdy.) I will update the link(s) below if I happen to see any more online shops that are worth mentioning. You may consider using Tenso to buy the item or using your favorite proxy bidder.

https://www.cso.co.jp/partsshop/bd1.html