I have a Pentax my with a zoom lens, and I also have a Canon AE-1 Program. which is my all time fave. I would like to use the Pentax zoom lens on my Canon. Is there an adapter to make that possible? And where would it be available? If item is possible, what would something like this run...or would it be cheaper to just buy a zoom lens for my Canon?
It depends on the mount of your Pentax camera.
Finding a ready-made solution to adapt to Pentax K mount to Canon FD is basically not something you're going to find.
If you have a thread-mount M42 Pentax camera, then you can find adapter rings to FD.
And as there are Pentax 6x7 to M42 adapters, you could stack adapters if your Pentax is 6x7.