https://www.amazon.com/Imelod-Contact-Microphone-Ukulele-Mandolin/dp/B01M5IB4X7
This one is nice in that it has only a 10 inch lead so you don't have wire hanging all over. The lead is braid instead of plain plastic. "looks" like some of the more expensive ones.... That being said, I know of no manufacturer that uses a different piezo element in its' pick ups.The plastic housings may look different, but electronically and mechanically they ALL are the same. The price points are based on marketing, not what is inside. And at under 10 bucks it is sure worth the trying either way......
I would suggest perhaps using a small square of "alien tape" to affix to the dulcimers top, no worries then of double sided tape marring your good looks.....