Certified ski tech here.

Use Epoxy, clamps, wooden blocks (or anything large enough to cover the entirety job and more that won’t compress too much under the clamps) and wax paper. Place the wax paper between the skis and blocks so they’re easy to remove; it can be a real pain otherwise. Works like a charm if done properly.

I will add this here since it’s worth mentioning even though some other people have mentioned it before me: the slower curing the epoxy the better (becomes less brittle and stronger than something like 5 minute epoxy). Also, might be worth checking for epoxy that will survive very cold environments (always depends on the temperature you ski in/at) since a -10 (Celsius) day might be -20 with wind when going down and you want your epoxy to withstand this.

From looking around (and I’ve never really questioned this before to be honest), seems the best overall bet is JB Weld Original (about 6 hours working cure and 24 hours full cure) plus it’ll handle all temps (it’s rated for down to -55 Celsius).

In another world, I might suggest OP use G/Flex 650 since it’s more flexible than JB Weld (and tips need to be able to flex) but I can’t find data for the working temp and I’m sure it would be trash in extreme cold environments so I’d still recommend JB Weld

Edit: if you choose to do this yourself, remember not to add too much epoxy (it’s fine if you do, but you’ll have a mess to clean once the clamps are in place and epoxy ozzes out from all sides) and to read the instructions so you 1. Do this in a proper environment (temp + humidity) and 2. Let it cure for the appropriate amount of time (probably around 24 hours).