Single transistor equivalent to ULN2803?

[Sunny]

As per subject, I don't need an array, just one channel. Is an
equivalent Darlington transistor commonly available?

The application is a 12v to TTL interface. ULN2803 datasheet is here:

http://www.onsemi.com/pub/Collateral/ULN2803-D.PDF

TIA

Sunny