M14X R2 Fan to Heatsink Tape

Don't stress. You can use electrical tape in its place. 

Or you can try packing tape.

No stressing here ;-)

Electrical tape gets unhappy when it gets hot and leaves a very sticky residue behind where as this tape does not.

I am guessing there was a purpose this tape was placed there and simply am trying to get another piece or roll lol. It's not critical but would be nice to find out.

Electrical tape wouldn't be good to apply directly to the heat sink, but at you are talking about applying it to a non heat generating area of the laptop then you will be fine. Vinyl electrical tape usually doesnt get soft until around 120F, I know people who even use scotch tape in these locations. The fan itself doesnt heat up to the high temps other components can. You can also buy non vinyl electrical tape at most hardware stores. 

There are plenty of "heat and electric resistant" tapes out there, but often times it is overkill. However, like I said, if you want to be cautious use cloth electric tape or another non vinyl version. Higher quality electrical tapes are even used for stove and furnace insulation while still maintaining their electric resistance. Other people use scotch tape, painters tape, masking tape, and more. 

I am unaware of the specific brand or type of tape used in your system when assembled, but obviously Dell is going to try and use some decent quality stuff. They have specific thermal paste and pads that are not purchasable by most consumers, for example. 

I found a nice solution. Aluminum tape that leaves no residue when removed. I replaced the 2.3cfm CPU fan in my M17x R4 with an M14x R2 fan rated at 10.4 cfm.  Temps have dropped substantially while gaming ;-)

I see what you were looking at now. Strangely I was under the impression you were talking about the tape that hold down the fan wiring. Which is why I suggested electrical tape. 

However, regular vinyl electrical tape definitely would get hot and "soft" if placed in the manner in which you actually intended. 

Still be careful about the tape you use. Best to avoid conductive tape, but risk is usually minor. Some higher quality cloth or other material electrical tapes I would still recommend, but glad you found something that works for you. 

I measured with my DMM from the tape to the heatsink and there is no conductivity since the adhesive carrier is intact. the top of the fan is plastic so no worries there