Seems the CAT-10020 is the same (for parts anyway) as the
10020SQ on the parts web site,
It looks like I need the "upload tubing" part #42 and probably the two end fittings to make things easier which are part # 43.
I'll place the order and hope for the best.
This is actually quickly becoming obnoxious, as I had to top off the E91 tires with a cigarette power unit I luckily still have around. And I'll need it again very soon for other projects.
Right now I have so many immediate fires to put out, it would be comical if I weren't so literally sick and tired and buried under a million things to do.
Edit: Their website let me get all the way to entering my credit card and then failed because they are using non-standard draft-spec JavaScript which is fucked.
I have called and placed the order, and confirmed with them that I am ordering the correct parts. Now we wait.