Dorbin has a minimum order requirement. Orders smaller than the required minimum have a longer lead time as we need to consolidate onto a "stock" order. If you need a faster lead time, simply exceed the minimum order amount.
Dorbin has put into place extreme price increases and their material has become exceptionally expense and strongly urge you to consider Reese or Pemko as alternates.
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This surface mounted interlocking set of "split" astragals, while is not as elegant as as the century old installtion you are working on, I ought to do at lease as good of a job, though again less elegant.
Please le t me know how this turns out. You answer will serve to guide future weekend warrior home owners in your same perdicament.