Advice, Please

You will probably all recognise this item. It is currently sitting on my desk, and of absolutely no use to me as the small piece of plastic that slides up and down this rail has broken off and disappeared. To add insult, this has also happened to another two SD cards in recent weeks. The gremlins are afoot!

A bit cheeky really but the reason for the blip is to seek your help with a possible solution to the dilemma of memory cards which cannot be used in the cameras because this 'little widget' has been lost. I have tried a bit of electrical tape across the appropriate part of the rail but to no avail (I would also be worried about it coming off in the camera). Damn, these cameras are clever at spotting a hood wink.

ps. anyone else having a problem using BlipLR, second day in a row for me!