HDTV 5 BNC output

[shades]

I have a sony 1272 crt projector and viewsonic 21 inch crt monitor that have rgbhv 5 bnc input, and I have recently ordered brighthouse HDTV service. They brought out the pace 550 box, and all it has is dvi-d and component output. Niether of these will input into my projector or monitor. I have seen older hdtv tuners that output via an hd15 connector to rgbhv 5 bnc. Is there some piece of CHEAP equipment - perhaps another HDTV box anyone can recommend that will work? I can connect my computer to the projector through the ATI video card with the hd-15 to 5 bnc cable. How would I get the cable hdtv signal into the computer though?
TIA

[bdraw]

Here you go
http://www.audioauthority.com/aacconsumers/9a62detc.html

This will do just that, well kinda, this will output to vga which can easly be converted with a relativly cheap adaptor to rgbhv.
This retails for 189.99 but check digitalconnection.com

https://www.dcpuraty.com/store/Product_Details.asp?ProductCode=9A62

VGA to RGBHV adaptor $29.99
https://www.dcpuraty.com/store/Product_Details.asp?ProductCode=HD15M5B6

I order from here all the time, they are the authority on Home theater PC products.
Very good support, email them instead of the manufactor. They are great.