You can still get buckling spring keyboards at Unicomp. Their keyboards are not as robust as the real Model Ms were, but are still well built and should last a great long while.

[Steve M. Potter] loves and respects a good, solid keyboard as much as we do and wanted to build an heirloom-level battleship to grace their home office. Well, you couldn’t ask for a better donor keeb ...

Hasn't this been out for a while? I've looked at it seriously. If it had 15 f-keys rather than 12 I'd be tempted.

The Model F Ultra Compact is a hardcore buckling spring keyboard for nostalgic enthusiasts. Modern mechanical keyboards hold endless possibilities in design and function, yet one experience remains ...