Where to buy a set of metal detector test cards

We need to replace missing metal detector test cards for our plant. Is there a place someone can recommend where we can buy an entire set? 

https://fortresstechnology.com/shop/

https://www.testrods.com/shop-now/

from the company you purchased the MD from (ask for them for free )

Wow. I was going to say just what Scampi said.

Our clients have always gotten them for free or for just a postage charge.

Detector Calibration System Pieces | Metal & X-Ray Detector Test Pieces | Inspection Equipment Test Pieces | Detectamet

all the other mentioned are fine.   

 

Ill add:    

 

https://www.calibrationwands.com/

Make sure you get a certificate with them. Companies will sell that separately. We had wands from our MD company but some of the certificates went missing. So I ended up having to order more.