Replacement BOT/EOT markers for 1/2" tape

[Bjoren Davis via cctalk]

Hello Retrofolks,

I have a 1/2" 9-track magtape which is missing a BOT marker.
Does anyone have a recommendation for a reflective tape to use to 
replace the BOT marker?

I was looking at 
https://www.amazon.com/Metalized-Polyester-Adhesive-Multiple-Available/dp/B07TXN8TD8, 
but I have no idea if it's too stiff/thick/not sticky enough/etc.

Thanks.

--Bjoren