I have a Tascam US122l audio/midi interface, in good working condition, which I would like to exchange for a similar interface which would be compatible with an iBook G3 and OS9.
It works wonderfully with Windows XP, that's all I can say about it. I have tried using it with OS10.2, windows 7(64bit) and windows 10"(64bit) with varying success but only had it fully functional with XP sp3 and my laptop.As far as I am aware, it is not compatible with OS9 (although if anyone knows differently, please get in touch!)
If it could be of use to you and you have an audio/midi interface which would be of use to me, let me know! (people in UK only please, West Mids if you would prefer to swap in person.)