Thanks Jim. Having looked again (thank's for the links) I believe I had already studied all of those. None of them is exactly right: The critical dimension is 11/16 (.6875) which is the length of the shorter side (e.g. taken from the rounded edge to the opposite flat edge). 11/16 is the width of the insert into which these slide into the molding itself. If the fastener is any shorter it will fall out, any longer it won't slide in. The other dimension is not very important - as long as that first side is 11/16 then it can't really be too wide or narrow on the second side.
Autofastco's
J02164 is close. It has an 11/16 dimension.... but unfortunately it's on the wrong side :-/. I guess I could consider using it "sideways" however I think the holes in the door under the windows that are suppose to receive the clip are rectangular (but maybe they are round... I will check that...). I guess it is possible I could modify the fastener by twisting the inserted portion... but I'm skeptical that is going to work very well...
Meanwhile, as I mention above, Autofastco's
J01986 is, I
think, workable - the critical dimension on it is 3/4 so it
might be too long but I could probably compress 1/16 out of them manually. However even then these don't have that little insulation pad... (and perhaps per above suggestion the best approach is to try and add that pad to this fastener...).
I don't think any of the AMK ones are workable - unless I missed something I think they are all either two short or two long on that critical dimension. Yesterday I sent an email to
Restoration Specialties as they have
a few that look close as well however (a) they do not list dimensions on their website and (b) they claim to stock a number of fasteners that aren't listed on their website. Hopefully they have a suggestion...