2.0 n/a Eclipse bedplate o-ring 420a engine. Is this ok? I have an o ring kit and this was a perfect width match.

that one should work, is it the only one you have that fits round the edge? how much to tall is it?

That one is 3.5mm thick and the other image I posted in my profile is 3.1 mm thick but it doesn’t fill out the edge… Its the closest thing I can find. I can not at all find a part number, besides calling this dealership 150miles away.