ASR-10 O.S. Disk 1.61

I’ve been trying to track down a copy of OS 1.61 or OS 3.08 on floppy. I have a rackmount version running os 3.53 that’s running a bit jerky. Moving through certain menus is slow and the sampling level meter jumps several segments at a time. None of this happens on my eps16+.

The service manual suggests that OS 3.53 isn’t compatible with ROM 1.50b that comes installed on the rackmount versions so I thought I’d try 3.08, or, since I don’t really use the audio track feature I’m also curious about 1.61.

Does anyone have copies of either they’d be willing to sell?