If you are set on a titanium rack and consider other alternatives, Lynskey makes a rack. I have not priced the Airy but the Lynskey looks more expensive than I would ever buy.
https://lynskeyperformance.com/lynsk...ar-cargo-rack/
They do not provide much detail for dimensions and the bikes they make have rack mounting points several inches above the axle so most racks sit a bit high on a Lynskey bike. I do not know if the Lynskey rack is made a bit shorter to compensate for their frame design or not, but the Lynskey rack might sit a bit low on a different bike or might not even fit at all. If you consider that rack, double check the dimensions before ordering.
You might just buy a cheap rack that is in stock somewhere and then later buy the Airy. I use an aluminum Racktime rack for touring on my titanium Lynskey Backroad. For riding around near home on that bike I use a rack it is a low capacity Nitto rack that looks nice but is heavy and does not have much capacity. When touring, I am not as weight conscious as you (I use four panniers), thus I never considered a titanium rack for my titanium bike.
The supply chains are a mess right now. Shortages of container ships, shortages of containers, shortages of rail cars, shortage of space to store containers at ports, the only thing available in abundance these days is the Delta Variant.