Desk spare parts

[m0nty]

I'm not sure where to post this so I hope you won't mind if I put it here. We have one classroom which has custom-built desks which have fold-down lids which incorporate a flat screen. Along the back of the lid is a plastic-and-rubber strip which forms a seal when the lid is folded down (photo attached). The bit marked (A) is hard plastic and the bit marked (B) is softer rubber which forms the seal.

Many of these are becoming broken and some have gone missing. Anyone know where to get spares? I don't know the name of the desk manufacturers -- they might be Isis, early models, since the later ones we have don't have this plastic strip and are generally much more robust.

Thanks in advance!

--
Simon