I have a thread running in the Valuable Info forum showing photos of various Glocks, including a Gen1 factory-ported 17L. Click the link below to visit it:
Go to post number 7 to see the Gen1 factory-ported 17L, and check post numbers 30 through 32 to see the 24C, 17C, and 19C factory-ported Glocks.
If you really wanted a ported 17L, you could buy any generation 17L you'd like, and install an aftermarket ported barrel made by a company other than Glock. Or, as said above, buy a 17L and have the stock barrel ported by a company like Mag-na-port International:
"That means that no matter how we reform health care, we will keep this promise to the American people: If you like your doctor, you will be able to keep your doctor, period. If you like your health care plan, you'll be able to keep your health care plan, period. No one will take it away, no matter what." – President Obama, AMA speech, June 15, 2009.
see 13:20 - 13:58