thanks a lot marc,
as for digikey etc, I tried with farnell, they eventually sell super small batches, you feel like you buy expensive packs of bandages
I'll see with vtek if they have medium sized supplies.
for now, to be honest, I used 3M clear tape, good tack, and I was able to repair and connect old pieces of tape and protective cover, and I never jammed a feeder.
I'm close to finish my old reels, so I doubt I will need actual splicing as I order my parts reeled, for free (farnell) or a small fee (mousereel, digireel).
I also keep a box full of starting / tailing tape and old pocket tapes of all size so that I can improvise feeders, very useful when testing vision and placement.
Thank you !