Well done Mowerfreak it does look to be in fairly good condition.I know what you mean about the Auto drive catchers they are different and even harder to find.All I can suggest is to wait you will find one. Unfortunately I don't have any spare one.You will possibly also find it hard to find the right starter as well as they only came on that model.Also the original catcher for them were green also.Even I haven't found one of those yet.
Here is a picture of one of mine.This one is compete and running the other is missing it's drive system.I am going to put it back together and run as an auto drive I just need the top part of the handles to do that. So then I can change it's name from auto push to auto drive.Keep up the good work and hope it works out the way you want it too.Keep me posted I'm always happy to help and glad to see someone else showing an interest in these fine old girls.
[Linked Image]
[Linked Image]
[Linked Image]

Here for a good time,not a long time.