Here’s a link from someone that replaced their switches http://www.mikesmicromania.com/2015/01/beatbuddy-footswitch-modification-no.html
Carling switches, although a little more expensive, are very durable
- Carling footswitch, SPST, momentary ON-(OFF) normally closed, or
- Carling, SPST footswitch, momentary (off-on), normally open
Either type works as the foot switch detector function will detect and adapt.
https://www.amplifiedparts.com/products/P-H552