Try myarchicad.com If you didn't have an account there when 17 was out, I'm not sure if it'll let you look backwards for old versions. If not, phone US support or your reseller either of which should be able to provide you with a link.
One of the forum moderators
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB