as Peadar said
have used them before and know lots who do
great work
not sure if they do what you are looking for but i would guess so
as they can make anything i asume
great work
[quote author=gtpeadar link=topic=36697.msg420674#msg420674 date=1358880579]
Get one made up by these folks http://www.souhan.ie/
[/quote]
Only on the straight through pipe without the narrowing though? I got one before for a chap and another lad had one here with a nur spec. Ring them and tell them you want a standard pipe to fit a standard backbox, I'm sure they'd oblige.