Burns will expand the ends for $7.00 per expansion,not sure how far the stainless can be stretched (? anyone know?). An option I have used is getting a section of a radiator hose that is shaped correctly an steps up a 1/4". IE: from 1 3/4 to 2" OD. There is one on the lower metal tube here that has the above dimensions. The upper hose changes 1/4" also but in a longer length of hose.
[IMG]
[/IMG]