Hello,
Currently on ebay are the following slides of Royal Aircraft Factory S.E.5a aircraft:
Royal Aircraft Factory S.E.5a C6385 of 74 Squadron
https://www.ebay.co.uk/itm/A-Glass-L...AAAOSwOEZgR6Do
https://www.ebay.co.uk/itm/B-Glass-L...gAAOSwGLZgR6E0
and already well known
Royal Aircraft Factory S.E.5a A8909 of 56 Squadron
https://www.ebay.co.uk/itm/Glass-Sli...kAAOSwgKpgR6IU
Regards,
Clint