As the title really.

If you’ve got one FSA do a headset that fits

http://www.bicycleheadsets.com/

http://www.bicycleretailer.com/sites/default/files/downloads/article/CaneCreek%20SHIS%20Poster%20Small.pdf

What is the question?
Is it a headtube that you are looking for, to make a frame?
Or a headset to fit into a frame with a Campagnolo style headtube?

Campy=Campag unless you are a Septic….. :-/

Would the OP care to rephrase the title into a meaningful question perhaps?
Or should I just start a thread with a random phrase in it too?

If the question is “Is a campy style integrated headtube any good?” then my answer is unequivocally yes. Fitting a headset is a tool free doddle and eventual bearing replacement will be dead easy.

If the question is “Where do I find a headset?” then you’re looking for an Integrated and not Integral jobbie. Hope do them amongst others.

Does that help?

If the question is “will it creak?” then that answer is “probably..”