My '03 Camry 6 cylinder has a broken front mount. My mechanic orders the part but it's different from what's on my vehicle. Mine has a vacuum line that leads to some sort of switch. Turns out that Toyota made this change but nobody carries my part in town, only online like through Rock Auto. It's also twice the price. Mechanic says that in in 30 years of wrenching he has never seen anything like it. Why is it this way, and can a standard mount be used and say just cap off the vacuum line?