Sharing existing cable runs with cable and satellite

[dmfabri]

Seeking advice. Have had dishnet sat for years and am very satisfied. Have wowway cable for internet. recently wow raised internet rate to the point that for a net $7 per month I can have same internet service and digital TV w/200+ channels (i plan to use cable primarily as backup - for the 7 bucks/mo i am getting additional channels, starz is one, and backup to the sat). i have an older TV (only one coax input). i can diplex the lines into one cable to leverage the existing long run, but once i get to the TV area and past the 2nd diplexer, I have two coax and just the 1 coax to the TV. is there a switch that will accept a sat coax and a cable coax and connect to the TV allowing manual and/or automatic switching between sat and cable feeds? Thanks in advance.