Hi Tony
Just a thought..........
I have just priced up the parts required to make up my own underslung system, which includes 2 silencers per side (RV

and the total cost is about £100, thats £300 less than pilgrim. Obviously you then have the welding to sort out but even if you had to tap up a local chap to do it for you there is still a big saving.
I have a pattern (pipe sizes/bends etc)which I beleive will work, if it does I can let you have it if you like ? I am making mine up this coming week.
Regards
Dave
' and it was going oh so well '