similiar probably isn't the same.
(has a look) nope totally different.

Printbite does not flex. Does not need to.
I think you're going to have exactly the same problem with a flexible printbed. If you have to bend the plate to release the print, then with a very thin print it's going to get bent when you try to release it.
pei tape, sort of works - just not that well.

Try it, might work - but don't think it's anything like printbite.