The kick boards are called "el plinto" (plinth) and Fuzzion Cocinas would be my first choice too. If not in stock I would drive to Puerto del Rosario, straight to
Ideal, not just because it's the fastest shop to get to (from Caleta) but there's more DIY shops around.
The next one is
Brico MG, we've shopped there before and I can remember they do stock some profiles just not sure if plastic or timber only.
Third shop is just a few yards up the road and the name is something like
Maderas (whatever), google shows a different kitchen outlet (that one is gone) but they do sell similar products. They also cut sheets of chipboard to size and tape the edges so definitely worth to visit if you're planning any diy in the future. We've been there a couple of years back and they had for sale some pvc profiles 10+ feet long at the back of the workshop.
Haven't have been in any other shops in
Risco Prieto Industrial Estate but a 5 minutes drive will take you to
Ferreteria Saaverda, quite a large DIY shop. Actually two - you have to walk out and cross the road to get to the other part (paint+bathrooms).
There's also one ugly solution: Crossed my mind once Emmi mentioned the plastic tubing. What's about using a trunking for electric cables. Don't think they do transparent trunking, though. Have I said ugly already; right?