Phone ring flasher/amplifier? (Land line)

Does anyone have current recommendations for a phone flasher/phone ring amplifier? Amazon seems to have many different models available, ranging from 6$ each to 100+$. I am seeking something to connect between the wall and a multiline complicated work phone.

Has anyone used a flasher and found it to interfere with the operation of the phone or the phone system? I know my workplace legally must accommodate me and figure it out for me, but if I can solve the problem simply and cheaply on my own it would be politically better. However, if I mess up the phone system in the process, that would be politically even worse.

What I really wish is that I could make the work phone vibrate something in my pocket or on my wrist. My own cell phone or a smart watch/bracelet or something. Does this exist?