Here's an update on the email results.

As I said a while ago (02-20-15), I sent an email to .
Later that same day, I received a reply!!!

In the reply I was asked for more details regarding what I want
(specs) in the filter. I told Sneva the frequency (276Mhz), etc. I have not
received another reply. I sent another email to Sneva, but still no reply.

I asked Sneva if he (assumed) can't make the filter, please let me know
so I can look for another source. Still no reply.

Hi,
UPDATE:

I finally received a quote, $185.00 plus $20.00 shipping. Since this
filter has to be custom made, the price is high.

Hi,
FINAL UPDATE:

I received the filter from Tin Lee Electronics. This filter removed
the streaming promos that ANNOY me. The results, with the promos
"removed", when I go to "On Demand" (a small delay occurs), now
I see whatever channel I was viewing, instead of promos. This
can be handy when commercials come on, and I can check what
is "on demand" during commercials of a program I am watching.

With my signal generator, I corrupted the streaming video to
the degree it could not be decoded. The filter removed the signal.

John