Pemko 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.
Pemko 253D 36" Dark Bronze Anodized Aluminum Half Saddle Threshold
A door sweep might work such as the Pemko 315DN 36" Dark Bronze Aluminum Door Bottom Sweep with EPDM Insert and seen here:
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Or perhaps an automatic door bottom such as thePemko 4131DPKL 36" Dark Bronze Anodized Aluminum Automatic Door Bottom with Pemko Prene insert - Surface/Semi-Mortise Mount as seen here: