Old Co-Ax 'Satellite' cable (Shooters hill SE3)

Hi All, I just got rid of Virgin cable after 20 years plus with them, and managed to set up an old satellite dish to get FreeSat - sadly the cable i had was a bit short and so there are tonnes of joins in it affecting the signal a bit.... does anyone have by any chance some cable from a dish they've taken down?

Also my neighbour is now thinking of doing the same so if you have an old dish too that would be great - preferably the old bigger size dish as it's easier to do the satellite pointing and picks up more of them. Thanks.