Wanted Td5 90 silencer exhaust

I have a 90 defender td5 with a straight through exhaust. It's a little loud for me so I am looking for a silencer to pop in the middle/back just to quieten down a little.
My exhaust is only 6 months old and I can just unbolt a part of it in order to fit a silencer. I don't think 300tdi/200tdi exhaust sections will fit so it will need to be from a td5.

I am based in Salisbury