I was searching for information on [topic] and came across your resources page: [link]
It's a great list. I discovered some new resources, so thank you.
I have another resource you may want to add to that list. It's a great addition because [reason (name what the other resources are missing)]. Take a look at it when you have a few minutes: [link].
Thanks for your time!
I was looking for some information on [topic] today, when I came across your excellent [page].
It was super helpful! I especially liked [personalized sentence].
Anyway, I realized that I recently published a page about [topic]: [link]
It’s [brief description].
It might make a nice addition under the [section name] on your page.
Thanks again for all of the excellent resources. And have an awesome week!