So a month or so ago my Winder MEii did the same thing they all do eventually, the battery door latch snapped.
And so today I decided to have a go at repairing it without resorting to duct tape.
I have to say, after a few failed attempts I've got something i'm fairly happy with, and better still, it won't break again.
So, attempt 1 was to re-mould the part from plastic of some form.
I didn't want to go out and buy a whole moulding kit for one tiny part, so I used what I had around.
The mould was made from car detailing clay, with the part pressed into it.
I then sprinkled bi-carb soda into the mould and dripped liquid superglue onto it, according to the internet the bi-carb and cyanoacrylate react and form a hard plastic.
It sort of worked, the result was pretty accurate to the mould, BUT the "plastic" formed was not particularly hard, the consistancy was more like really cold toffee.... not rigid like the catch needed.
In the process of making that mould the original part broke further, so the next moulds weren't as neat, I tried the superglue again with a different amount of bi-carb, same problem.
I also tried knead-it (JB weld) which was too thick to get into the mould without deforming the mould.
In the end I grabbed a spare bit of aluminium extrusion and have spent the afternoon cutting, grinding, filing etc to make a new part.
the finish isn't perfect, but I don't really have all the right tools for this job.
If I had a small milling machine it would have taken me half the time and with twice the quality.