Checked with dad on the switches. The power switch for the DS-5 is a SPDT on-on (C&K part number 7101). We custom order these with a short bat so they are harder to break off.
If your DS5 has a mono/stereo switch, that will be a DPDT on-on (C&K part number 7201). Again, we order these with a short bat.
On the DS-5R, we use the custom black bushing and bat like we use on the instruments. We have all these parts available, but of course since we custom order them, they are a bit pricey. The off the shelf parts will work fine.
The DS-5R isn't in the online store. If you want to order one, please have the serial number of the instrument handy so we can update the file. You can order from us or through any Alembic dealer.