I have a chronic problem with an exhaust leak from under the right turbo of my stbd engine. Every 2 seasons, I have to r&r the turbo and reseat it on a new gasket. The studs no longer hold in the component (riser?) that it mounts on, so I had to replace them with bolts and nuts. I'm considering removing the riser and having it resurfaced, but I'm concerned that I might be opening a can of worms with its overall condition.

Are these readily available, and does anyone have a good source for them? How pricey are they?