Hello Desertpagoda(kb),
Would like to support what Aaron already mentioned.
Try to get a new one. Those are also available as repros in very good quality - the usual vendors.
I know they sell a kit (containing all 6 strips) but don't know about single ones.
The old ones are mostly badly scratched and cannot be renovated properly.
However....,
(ther's always a 'however'), early 230ies up to serial 008768 have got another alu strip that is no longer available. But most likely you won't need that one anyway.
Best,
Achim
(usedaluminumstripcollectorduetoserialnumberissues)