That's the usual trouble with B&Os that have glass panels - the original tape won't last.
I reattached the glass of my Beocord 3500 (the same except mirrored/grey lid). I found that the best "tool" to remove the old tape is thumbnail even that takes some hour or two. But the result will be great and this way you won't damage the glass.
Any double sided tape will do, you might need to try different thickness' to find a good one. If you plan to hang the Beocord to the wall you'd better make it as secure as possible to prevent the glass... dropping... being smashed!
I'd love to have official B&O tape...
Bang & Olufsen - The art of controlling sound, picture and light