Same here and I've been doing mayo for fries a long time (japanese kewpie mayo my favorite - it's also eggier).
I just found a pair of this and curry ketchup, which is also delicious on amazon.
https://www.amazon.com/Classic-Fritessaus-Gewurtz-Ketchup-Spreader/dp/B08288YNZZ/ref=sr_1_3?dchild=1&keywords=Frite+Sauce&qid=1612115094&s=grocery&sr=1-3