Well I've been looking for that too. With no luck. Actually, if
you want to watch TV on your computer, there are a variety of PCI
slot cards, and even usb devices, that include clear QAM tuners.
for as little as $20. But a stand-alone QAM tuner? Nothing that
I've found.

In theory, a DVR should include such a tuner. But you'd have to
find one that still has analog outputs for the old tube TVs. And
then you might still have the monthly subscription fee for the DVR.

Please post here if you find an inexpensive solution to this
problem.