17/73deg oversize stems??????

oldskoolkool Posts: 86
edited December 2008 in Workshop
I see quite a few 17/73deg oversize stems advertised by various manufacturers but trying to find a bloody shop that stocks them is a nightmare it's always the usual 84deg option.
Does anyone know anywhere thats actually sells them? Im after the 3T ARX PRO mainly but also like the THOMPSON X2.Anyone wanna suggest any others?