Alternative to Kapex Hold-Down Clamp?

[Hotwheels]

I have a first generation Kapex and I use the older aluminium sawhelper wings for my cutting station. Occasionally I wish I had another hold-down clamp, but in the universe of options for Festools, I have not seen an alternative to the Kapex hold down clamp. Does one exist?

 

[Frank-Jan]

I sometimes use regular festool clamps in the groove on the old model crownstops.
The kapex hold-down clamp is very good, and I've seen people that modified one to work with non-festool mitersaws.  I haven't seen other mitersaw hold-down clamps that are as practical to use as the kapex version.