My understanding is you order it from the manufacturer. They for the past couple years have claimed a lead time of 4-6 weeks but consistently shipped in 10 days or so. No idea the current situation.
Ordering from Terasic will get you a board much quicker than waiting for one to show up at a distributor like Digikey given the current supply situation. Shipping times from Terasic also tend to be much quicker than they quote on their site. However, their shipping charges are quite steep, and you might get hit with duties as well.
etiam|3 years ago
https://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=...
MegaDeKay|3 years ago