Adding Bing Custom Search

Silverstripe Version: 3.1.8

I’m fairly new to Silverstripe and have inherited a legacy site running version 3.1.8.

I’ve been asked to investigate adding a Bing Custom Search to the site where the results are returned to a page on our website.

I’ve just found this add on - but it says it’s for Silverstripe version 4.

I just wondered of there is anything out there that will work with version 3.1.8 or can anyone give any advice as I am a fairly new to development.