Re: strut replacement, OEM or what?
As a third alternative, try pricing OEM parts from a third party importer.
Two in the States come to mind: Recycled VW 1-313-373-2300, and PAP 1-800
944-2964 (1-404-449-3146). Oh, of course, there is also SHOKAN, at 1-800
ALL-AUDI. Do the 800 numbers work in Canada?
How much labor (hours) have you been quoted? From Bentley, it appears that
replacement of the strut insert is unusually simple on the 5000.